A box contains five bulbs out of which 3 are defective. If four bulbs are chosen at random, find the probability that atleast one bulb is good.  Pick one:
A) 39/10
B) 29/10
C) 19/10
D) 9/10
E) 125/128
Required probability   = 1 - 1/10   = 9/10   Answer: 9/10
<result>D</result>
A box contains five bulbs out of which 3 are defective. If four bulbs are chosen at random, find the probability that atleast one bulb is good.