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Matching Socks Probability

1150BeginnerCombinatoricsProbability

AMC 8 · 2020 · Problem 13

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?

Answer choices

A
6
B
9
C
12
D
18
E
24
0 students attempted0% solvedRating 1150

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