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21
1994 AJHSME Problem 21
1994 AJHSME Problem 21
Source:
July 9, 2011
Problem Statement
A gumball machine contains
9
9
9
red,
7
7
7
white, and
8
8
8
blue gumballs. The least number of gumballs a person must buy to be sure of getting four gumballs of the same color is
(A)
8
(B)
9
(
C
)
10
(D)
12
(E)
18
{\text{(A)}\ 8 \qquad \text{(B)}\ 9 \qquad \text(C)}\ 10 \qquad \text{(D)}\ 12 \qquad \text{(E)}\ 18
(A)
8
(B)
9
(
C
)
10
(D)
12
(E)
18
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