A box contains five bulbs out of which 3 are defective. If three bulbs are chosen at random, find the probability that all the four bulbs are defective?	Choose the correct choice:
A) 1/12	B) 1/11	C) 1/10	D) 1/198	E) 1/126
Out of five, two are good and three are defective. Required probability   = 31/103/51/103   = 1/10   Answer: 1/10
<result>C</result>
A box contains five bulbs out of which 3 are defective. If three bulbs are chosen at random, find the probability that all the four bulbs are defective?