Question

Assume there are 6 grey females, 4 grey males, 5 white females, and 5 white males. As in the book, the biologist selects two mice randomly.

What is the probability of selecting two males given that both are grey?

Answer 1

6+4+5+5=20
Total:20
5/20 = x/100
Cross multiply:
500 = 20x
500/20= 25
25/100= 25%
Answer:25% probability

Answer 2

there are 2 grey males each