If a box contains 10 bulbs of which just three are defective If a random sample of five bulbs is dra......

If a box contains 10 bulbs,of which just three are defective. If a random sample of five bulbs is drawn, find the probability that the sample contains no defective bulbs.

Total number of elementary events = 10C5

Number of ways of selecting no defective bulbs i.e., 5 non-defective bulbs out of 7 is 7C5

So,required probability =7C5 /10C5 = 1/12.

Hence, option 1 is the correct answer.

By: Amit Kumar