A box contains TWELVE bulbs out of which 3 are defective. If THREE bulbs are chosen at random, find the probability that atleast one bulb is good?  Choose the most appropriate option.
A) 250/251	B) 265/265	C) 241/242	D) 256/257	E) 219/220
Required probability
=1-3C3/12C3
= 1 - 1/220
= 219/220
Answer:219/220
<result>E</result>
A box contains TWELVE bulbs out of which 3 are defective. If THREE bulbs are chosen at random, find the probability that atleast one bulb is good?