RS Aggarwal - Mathematics

Book: RS Aggarwal - Mathematics

Chapter: 24. Probability

Subject: Maths - Class 8th

Q. No. 7 of Exercise 24A

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7

It is known that a box of 100 electric bulbs contains 8 defective bulbs. One bulb is taken out at random from the box. What is the probability that the bulb drawn is (i) defective? (ii) non-defective?

(i) Total number of electric bulbs = 100


Number of defective bulbs = 8


Probability P() =


Probability of getting a defective bulbs P(d bulbs) = = =


(ii) Total number of electric bulbs = 100


Number of Non-defective bulbs = 100-8 = 92 (Number of electric bulbs – Number of defective bulbs)


Probability P() =


Probability of getting a Non- defective bulbs P(bulbs) = = =


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