A box contains 5 detective and 15 non-detective bulbs. Two bulbs are chosen at random. Find the probability that both the bulbs are non-defective.

A box contains 5 detective and 15 non-detective bulbs. Two bulbs are c

1.	A box contains 5 detective and 15 non-detective bulbs. Two bulbs are chosen at random. Find the probability that both the bulbs are non-defective.
A.	5/19
B.	3/20
C.	21/38
D.	None of these
Answer» D. None of these

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A box contains 5 detective and 15 non-detective bulbs. Two bulbs are chosen at random. Find the probability that both the bulbs are non-defective.

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