A box contains ELEVEN bulbs out of which 5 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 answers
A) 325/330	B) 325/420	C) 369/430	D) 546/558	E) 124/131
Required probability
= 1-5C4/11C4
= 1 - 5/330
= 325/330
325/330nswer:325/330
<result>A</result>
A box contains ELEVEN bulbs out of which 5 are defective. If four bulbs are chosen at random, find the probability that atleast one bulb is good?