A box contains TEN bulbs out of which 6 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: A) 185/210 B) 195/210 C) 123/210 D) 154/210 E) 178/210
Required probability
=1-6C4/10C4
= 1 - 15/210
= 195/210
Answer:195/210
<result>B</result>
A box contains TEN bulbs out of which 6 are defective. If four bulbs are chosen at random, find the probability that atleast one bulb is good?