Probability Mcqs

Q.  A box contains nine bulbs out of which 4 are defective. If four bulbs are chosen at random, find the probability that at least one bulb is good.

a. 6/63
b. 2/63
c. 125/126
d. 1/126


ANSWER: See Answer
 
Required probability = 1 – 1/126 = 125/126
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