1. Let the average of $a, b, c$ be $M$, the average of $a, b$ be $N$, and the average of $N, c$ be $P$. If $a>b>c$, then the relationship between $M$ and $P$ is ( ).
(A) $M=P$
(B) $M>P$
(C) $M<P$
(D) Uncertain
1. B

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