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.	Pick one:
A) 125/176	B) 125/129	C) 125/126	D) 125/120	E) 125/130
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.