Three electric bulbs are chosen at random from 15 bulbs of which 5 are defective. The probability that atleast one is defective is

3 bulbs are chosen at random from 20 bulbs , out of which 4 are defective . The probability that the room is illuminated will be

In a box containing 15 identical bulbs, 5 are defective . If 5 bulbs are drawn at random from the box with replacement , then the probability that none is defective is

In a box containing 15 identical bulbs, 5 are defective. If 5 bulbs are drawn at random from the box with replacement, find the probability that (i) none is defective (ii) only one of them is defective (iii) atleast one of them is defective

In a batch of 10 light bulbs , 2 are defective . If 3 of the bulbs are chosen at random, what is the probability that at least 1 of the chosen bulbs is defective ?

In a box containing 10 bulbs, 2 are defective. What is the probability that among 5 bulbs chosen at random , none is defective ?

In a box containing 10 bulbs, 2 are defective. What is the probability that among 5 bulbs chosen at random, none is defective?

A box contains 300 electric bulbs out of which 18 are defective. What is the probability that bulb chosen will not be defective?

In a box containing 15 bulbs, 5 are defective. If 5 bulbs are selected at random from the box, the probability of the event that (i) none of them is defective is 12/143 (ii) only one of them is defective is 50/143 (iii) atleast one of them is defective is 131/143

In a box containing 15 bulbs, 5 are defective. If 5 bulbs are selected at random from the box, the probability of the event that (i) none of them is defective is 12/143 (ii) only one of them is defective is 50/143 (iii) atleast one of them is defective is 131/143