A man has 3 pairs of block socks and 2 pairs of brown socks kept together in a box. If he dressed hurriedly in the dark, the probability that after he has put on a block sock, he will, then put on another black sock is

Question : A man has 3 pairs of block socks and 2 pairs of brown socks kept together in a box. If he dressed hurriedly in the dark, the probability that after he has put on a block sock, he will, then put on another black sock is