Question

Andrea has 8 blue socks and 4 red socks. She chooses one sock at random and puts it on. She then chooses another sock without looking. If the first sock is red, find the probability that the second sock will also be red.
1)3/11
2)1/6
3)2/11
4)1/12

Answer 1

Hint:

How many red socks are left after she removes one?

How many socks are there in total?

Answer 2

remember, one is removed from the original total.

Answer 3

3/11