Difference between revisions of "2021 AMC 10B Problems/Problem 22"

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==Problem==
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Ang, Ben, and Jasmin each have <math>5</math> blocks, colored red, blue, yellow, white, and green; and there are <math>5</math> empty boxes. Each of the people randomly and independently of the other two people places one of their blocks into each box. The probability that at least one box receives <math>3</math> blocks all of the same color is <math>\frac{m}{n}</math>, where <math>m</math> and <math>n</math> are relatively prime positive integers. What is <math>m + n ?</math>
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<math>\textbf{(A)} ~47 \qquad\textbf{(B)} ~94 \qquad\textbf{(C)} ~227 \qquad\textbf{(D)} ~471 \qquad\textbf{(E)} ~542</math>
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==Solution==

Revision as of 19:43, 11 February 2021

Problem

Ang, Ben, and Jasmin each have $5$ blocks, colored red, blue, yellow, white, and green; and there are $5$ empty boxes. Each of the people randomly and independently of the other two people places one of their blocks into each box. The probability that at least one box receives $3$ blocks all of the same color is $\frac{m}{n}$, where $m$ and $n$ are relatively prime positive integers. What is $m + n ?$

$\textbf{(A)} ~47 \qquad\textbf{(B)} ~94 \qquad\textbf{(C)} ~227 \qquad\textbf{(D)} ~471 \qquad\textbf{(E)} ~542$

Solution