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?  Select.
A) 125/167 B) 125/118 C) 125/126 D) 125/128 E) 125/129
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?