A box contains eleven bulbs out of which six are defective. If six bulbs are chosen at random, find the probability that all the six bulbs are defective? Choose the correct choice.
A) 1/450  B) 1/422  C) 1/429  D) 1/136  E) 1/462
Out of eleven, five are good and six are defective. Required probability   = 6C6/11C6   = 1/462   Answer:1/462
<result>E</result>
A box contains eleven bulbs out of which six are defective. If six bulbs are chosen at random, find the probability that all the six bulbs are defective?