A box contains nine bulbs out of which 4 are defective. If four bulbs – McqOptions

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1.	A box contains nine bulbs out of which 4 are defective. If four bulbs are chosen at random, find the probability that all the four bulbs are defective.
A.	62/63
B.	125/126
C.	1/63
D.	1/126
Answer» E.

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