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A coin is tossed three times. Given that...

A coin is tossed three times. Given that at least one head appears, what is the probability that exactly two heads will appear?

A

`3/8`

B

`3/7`

C

`5/8`

D

`3/4`

Text Solution

Verified by Experts

The correct Answer is:
B
There are 8 elements in the sample space of a coin being flipped 3 times. Of these elements, 7 contain at least 1 head and 3 (HHT,HTH,THH) contain 2 heads. Probability`=(3)/(7)`.
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