A box contains nine bulbs out of which 4 are defective.
A box contains nine bulbs out of which 4 are defective. If four bulbs are chosen at random, find the probability that all the four bulbs are defective
Answer/Solution
1/126
Steps/Work
Explanation:
Out of nine, five are good and four are defective. Required probability = 4C4/9C4 = 1/126
Answer: E
Out of nine, five are good and four are defective. Required probability = 4C4/9C4 = 1/126
Answer: E