1994 AJHSME Problems/Problem 21
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Problem
A gumball machine contains 
red, 
white, and 
blue gumballs. The least number of gumballs a person must buy to be sure of getting four gumballs of the same color is
$\text{(A)}\ 8 \qquad \text{(B)}\ 9 \qquad \text(C)}\ 10 \qquad \text{(D)}\ 12 \qquad \text{(E)}\ 18$ (Error compiling LaTeX. Unknown error_msg)
