A box contains SEVEN bulbs out of which 3 are defective. If TWO bulbs are chosen at random, find the probability that atleast one bulb is good
Choose the correct answer
A) 5/6	B) 6/7	C) 7/8	D) 8/9	E) 9/8
Required probability ==1-3C2/7C2= 1 - 1/7 = 6/7.
Answer:6/7
<result>B</result>
A box contains SEVEN bulbs out of which 3 are defective. If TWO bulbs are chosen at random, find the probability that atleast one bulb is good