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 answer:
A) 125/128 B) 115/122 C) 125/126 D) 125/122 E) 125/112
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.