Answer:
3 times
Step-by-step explanation:
Given
18-white socks
18 blue socks
36 socks total
First time reached in,
18/36 ( =1/2=(50%)) chance of getting a white sock, 18/36 (=1/2=(50%)) chance of getting a blue sock
assuming you got a white sock,
17-white socks
18-blue socks
35 socks left in
Second time reached in,
17/35 (<1/2=(50%)) chance of getting a white sock, 18/35 (>1/2=(50%)) chance of getting a blue sock
You would be more likely to get a blue sock, assuming you did,
17-white socks
17-blue socks
34 socks left
Third time reached in,
17/34(=1/2=(50%)) chance of getting a white sock, 17/43(=1/2(50%)) chance of getting a blue sock
Regardless of what sock is picked you would have a matching pair of socks in hand
