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A colour blind man marries a women with normal sight who has no history of colour blindness in her family. What is the probability of their grandson b
Question

A colour blind man marries a women with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind?

A.

1

B.

Nil

C.

0.25

D.

0.5

Correct option is D

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