A box contains 13 bulbs, out of which 5 are defective. 3 bulbs are randomly drawn, one by one without replacement, from the box. Find the probability that there are only two defective bulbs.

A box contains 13 bulbs, out of which 5 are defective. 3 bulbs are randomly drawn, one by one without replacement, from the box. Find the probability that there are only two defective bulbs.

1. A
2. B
3. C
4. D

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Solution:

X can take the values 0,1,2,3
P(x=2)
The probability distribution of X is given is $\frac{40}{143}$.
Hence, Option (1) is the correct answer.

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