Ques 17 Exercise 15.1 Probability Class 10th Maths

Описание: Ques 17 Exercise 15.1 Probability Class 10th Maths

Ex 15.1 Ques 17) (i) A lot of 20 bulbs contain 4 defective ones. One bulb is drawn at random from the lot. What is the probability that this bulb is defective?
(ii) Suppose the bulb drawn in (i) is not defective and is not replaced. Now one bulb is drawn at random from the rest. What is the probability that this bulb is not defective ?

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Video by: Krishan Bhalla