A coin is tossed 500 times and we get

head : 285 times, tail :215 times.

When a coin is tossed at random, what is the probability of getting

(i) a head? (ii) a tail?

Two coins are tossed 400 times and we get

Two heads:112 times; one head 160 times ;0 times; 0 head :128 times.

When two coins are tossed at random, what is the probability of getting

(i) 2 heads? (ii) 1 heads? (iii) 0 head?

Three coins are tossed 200 times and we get

three heads:39 times; two heads: 58 times;

one head :67 times: 0 head: 36 times.

When there coins are tossed at random, what is the probability of getting

(i) 3 heads? (ii) 1 head? (iii) 0 head (iv) 2 heads?

A die is thrown 300 times and the outcomes are noted as given below.

When a die is thrown at random, what is the probability of getting a

(i) 3? (ii) 6? (iii) 5? (iv)1?

In a survey of 200 ladies, it was found that 142 like coffee, while 58 dislike it.

Find the probability that a lady chosen at random

(i) likes coffee, (ii) dislikes coffee.

The percentages of marks obtained by a student in six unit tests are given below:

A unit test is selected at random. What is the probability that the student gets more than 60% marks in the test ?

On a particular day, at a crossing in a city, the various types of 240 vehicles going past during a time interval were observed as under:

Out of these vehicles, one is chosen at random, What is the probability that the chosen vehicle is a two wheeler?

On one page of a telephone directory, there are 200 phone number. The frequency distribution of their units digits is given below:

One of the number is chosen at random from the page. What is the probability that the units digit of the chosen number is (i) 5? (8)?

The following table shows the blood groups of 40 students of a class.

One student of the class is chosen at random. What is the probability that the chosen student has blood group(i) O? (ii) AB?

The table given below shows the marks obtained by 30 students in a test.

Out of these students, one is chosen at random. What is the probability that his marks lie in the interval 21-30?

Following are the ages (in years) of 360 patients, getting medical treatment in a hospital:

One of the patients is selected at random.

Find the probability that his age is

(i) 30 Year or more but less than 40 years.

(ii) 50 year or more but less than 70 years

(iii) Less than 10 years.

(iv) 10 years or more.

A coin is tossed 100 times with following outcomes:

Head 43 times and tail 57 times.

In a single throw of a coin, what is the probability of getting a head?

A coin is tossed 200 times with following outcomes:

Head 112 times and tail 88 times.

In a single throw of a coin, what is the probability of getting a head?

A survey of 200 persons of a locality shows the liking and disliking of tea.

Out of these one was chosen at random. What is the probability that the chosen person likes tea?

In a locality, 1000 families were chosen at random and the following data was collected:

Out of these families, a family was chosen at random. What is the probability that the chosen family has 2 children?

The table given below shows the month of birth of 36 students of a class:

A students is chosen at random from the class. What is the probability that the chosen student was born in October?

In 50 tosses of a coin, tail appears 32 times. If a coin is tossed at random, what is the probability of getting a head?

In a cricket match, a batsman hits a boundary 6 times out of 30 balls he plays. What is the probability that in a given throw, the ball does not hit the boundary?

A die is thrown 40 times and each time the number on the uppermost face is noted. It was recorded as under:

A die is thrown at random, What is the probability of getting a 5?

In 50 throws of a die, the outcomes were noted as under:

A die is the at random. What is the probability of getting an even number?

In 65 thrown of a die, the outcomes were noted as under:

A die is thrown at random. What is the probability of getting a prime number?

On one page of a directory, there are 160 telephone numbers. The frequency distribution of the unit place digit is given as under:

From this page, one of the numbers is chosen at random. What is the probability that the unit place digit in the chosen number is 6?

Two coins are tossed 1000 times and the outcomes are recorded as under:

A coin is thrown at random. What is the probability of getting at most one head?

80 bulbs are selected at random from a lot and their lifetime is recorded in the from of a frequency table given below:

A bulb is chosen at random from the lot. What is the probability that the bulb chosen has lifetime less than 900 hours?

In a medical examination of 40 students of a class, the following blood, groups are recorded:

From this class, a student is chosen at random, What is the probability that the chosen student has blood group B?

In a group of 60 persons , 35 like coffee. Out of this group , If one person is chosen at random. What is the probability that he or she does not like coffee?

A die is thrown 50 times and the outcomes are recorded as under.

If a die is thrown at random, what is the probability of getting 8?

It is given that the probability of winning a game is 0.7. What is the probability of losing the game?

A coin is tossed 60 times and the tail appears 35 times. What is the probability of getting a head?

Each question consists of two statements, namely, Assertion(A) and Reason (R). Choose the correct options.

Each question consists of two statements, namely, Assertion(A) and Reason (R) . Choose the correct options.

Fill in the blanks

(i) probability of an impossible event = ____________

(ii) probability of a sure event = ____________

(iii) Let E be an event. then p(not E) = ____________

(iv) p (E) +P (not E) = ____________

(V) P (E) lies between ____________ and ____________

The marks obtained by 90 students of a school in Mathematics out of 100 are given as under:

From these students, a students is chosen at random.

What is the probability that the chosen student

(i) gets 20% or less marks?

(ii) gets 60% or more marks?

Is known that a box of 800 electric bulbs contains 36 defective bulbs. One bulb is taken at random out of the box. What is the probability that the bulb chosen is nondefective?

The table given below shows the ages of 75 teachers in a school.

Note Here 18-29 means from 18 to 29 including both. A teacher from the school is chosen at ramdom. What is the probability that the teacher chosen is

(i) 40 years or more then 40 years old?

(ii) 49 years or less then 49 years old?

(iii) 60 years or more then 60 years old?

There are 600 electric bulbs in a box out of which 20 bulbs are defective. If one bulb is chosen at random from the box. What is the probability that the chosen bulb is defective?

A bag contains 5 red, 8 black and 7 white balls. Is chosen at random. What is the probability that the chosen ball is black?

A bag contains 16 cards bearing number1,2,3…, 16 respectively. one card is chosen at random. What is the probability that the chosen card bears a number which is divisible by 3?

In a cricket match a batsmen hits a boundary 4 times out of the 32 balls he plays. In a given ball. What is the probability that he does not hit the ball?

Define the probability of an event E.

A coin is tossed 60 times with the following outcomes:

Head 28 times and tail 32 times.

In a single throw of a coin, find the probability of getting a head.

When a die is thrown, write down all possible outcomes.

Fill in the blanks:

(i) Probability of a sure event = _______

(ii) probability of an impossible event = _______

(iii) If E be an event, then p (E) +p (not E) = _______

(iv) If E is an event, then _______ <p (E)< _______

A die is thrown 80 times and the outcomes were noted as under:

If the die is thrown at random, What is the probability of getting a 2?

The probability of losing a game is 0.6 What is the probability of winning the game?

A coin is tossed 50 times and the tail appears 28 times. In a single throw of a coin. What is the probability of getting a head?

In a one day cricket match, a batsman hits the boundary 8 times out of 48 balls he plays. Find the probability that he does not hit the boundary.

Two coins are tossed simultaneously 80 times and the outcomes were recorded as under:

If two coins are tossed at random,find the probability of getting

(i) Two heads (ii) one head (iii) no head

Marks obtained by 90 students of Class IX in a test are given below:

Out of these students one is chosen at random. Find the probability that the chosen student obtains

(i) less than 20% marks (ii) 80% of more marks

(iii) 60% or more marks

The blood group of 30 students of a class were recorded as under:

If a students of this class is chosen at random, What is the probability that the chosen students has blood group

(i)0? (ii) A? (iii) AB?

In a survey of 100 families having 2 or less boys. The following data was obtained:

If one of the given families is chosen at random, what is the probability that the chosen family has

(i) 1 boy? (ii) 2 boys? (iii) no boy?

A die is thrown 100 times and following observations were recorded:

If a die is thrown at random, find the probability of getting

(i) a number less than 3? (ii) a number greater than 4 (iii) an even number

A survey of 600 students about their liking on coffee was conducted and recoded as under:

Out of these students one is chosen at random. What is the probability that the chosen student

(i) likes coffee? (ii) dislikes coffee?

Two coins are tossed 1000 times and the outcomes are recorded as given below:

In a simple throw of two coins, what is the probability of getting

(i) at most one head? (ii) At least one head?

A coin is tossed 80 times with following outcomes:

Head: 35 times and tail: 45 times.

In a single throw of a coin, if E be the event of getting a head, verify that p (E) +P(not E)=1.