Question

Q4. 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?

Answer 1

Answer:

(i) Total numbers of bulbs = 20 Numbers of defective bulbs = 4 Probability of getting a defective bulb = 4/20 = 1/5 (ii) One non defective bulb is drawn in (i) then the total numbers of bulb left is 19 Total numbers of events = 19 Favorable numbers of events =  19 - 4 = 15 Probability that the bulb is not defective = 15/19Read

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Answer 2

Step-by-step explanation:

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