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For which of these would you use a histogram to show the data?
(a) The number of letters for different areas in a postman’s bag.
(b) The height of competitors in an athletics meet.
(c) The number of cassettes produced by 5 companies.
(d) The number of passengers boarding trains from 7:00 a.m. to 7:00 p.m. at a station.
Give reasons for each.
The shoppers who come to a departmental store are marked as: man (M), woman (W), boy (B) or girl (G). The following list gives the shoppers who came during the first hour in the morning:
W WW G B W W M G G M M W WWW G B M W B G G M W W M M W WW M W B W G M W WWW G W M M W W M W G W M G W M M B G G W
Make a frequency distribution table using tally marks. Draw a bar graph to illustrate it.
The number of hours for which students of a particular class watched television during holidays is shown through the given graph.
Answer the following.
(i) For how many hours did the maximum number of students watch TV?
(ii) How many students watched TV for less than 4 hours?
(iii) How many students spent more than 5 hours in watching TV?
A survey was made to find the type of musicthat a certain group of young people liked ina city.Adjoining pie chart shows the findingsof this survey.
From this pie chart answer the following:
(i) If 20 people liked classical music, howmany young people were surveyed?
(ii) Which type of music is liked by themaximum number of people?
(iii) If a cassette company were to make1000 CD’s, how many of each typewould they make?
The adjoining pie chart gives the marks scored in an examination by a student inHindi, English, Mathematics, Social Science and Science. If the total marks obtainedby the students were 540, answer the following questions.
(i) In which subject did the student score 105marks?
(Hint: for 540 marks, the central angle = 360°. So, for 105 marks, what is the central angle?)
(ii) How many more marks were obtained by thestudent in Mathematics than in Hindi?
(iii) Examine whether the sum of the marksobtained in Social Science and Mathematicsis more than that in Science and Hindi.
(Hint: Just study the central angles).
The number of students in a hostel, speaking different languages is given below.Display the data in a pie chart.
Number of students
Numbers 1 to 10 are written on ten separate slips (one number on one slip), kept ina box and mixed well. One slip is chosen from the box without looking into it. What is the probability of.
(i) getting a number 6?
(ii) getting a number less than 6?
(iii) getting a number greater than 6?
(iv) getting a 1-digit number?