Jamal has a drawer containing 6 green socks, 18 purple socks, and 12 orange socks

Jamal has a drawer containing 6 green socks, 18 purple socks, and 12 orange socks

Jamal has a drawer containing 6 green socks, 18 purple socks, and 12 orange socks. After adding more purple socks, Jamal noticed that there is now a 60% chance that a sock randomly selected from the drawer is purple. How many purple socks did Jamal add?

(A) 6 (B) 9 (C) 12 (D) 18 (E) 24

answer：B