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?	Answers:
A) 125/119
B) 125/129
C) 125/126
D) 125/129
E) 125/192
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?