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UKMT Intermediate Mathematical Challenge, 2023

Algebra Difficulty 2.0 Junior Find the answer United Kingdom

The mean of $p$ and $q$ is 13; the mean of $q$ and $r$ is 16; the mean of $r$ and $p$ is 7. What is the mean of $p$ , $q$ and $r$ ?

(A) $12$ (B) $13$ (C) $14$ (D) $15$ (E) $16$

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