A box contains nine bulbs out of which 4 are defective. If four bulbs are chosen at random, find the probability that atleast one bulb is good? Select the correct option.
A) 125/128  B) 125/120  C) 125/126  D) 125/125  E) 125/121
Required probability = 1 - 1/126   = 125/126   Answer: 125/126
<result>C</result>
A box contains nine bulbs out of which 4 are defective. If four bulbs are chosen at random, find the probability that atleast one bulb is good?