A box contains nine bulbs out of which 4 are defective. If four bulbs are chosen at random, find the probability that atleast one bulb is good.
Choose the correct choice from the following choices:
A) 6/63
B) 2/63
C) 125/126
D) 1/126
E) 1/63
Required probability = 1 - 1/126 = 125/126   ANSWER:125/126
<result>C</result>
A box contains nine bulbs out of which 4 are defective. If four bulbs are chosen at random, find the probability that atleast one bulb is good.