The mean weekly salary of 9 teachers in a school is $1,000. If the school has 9 teachers and 11 assistant principals, and the mean weekly salary for the teachers and assistant principals combined is $1,275, what is the mean salary of the assistant principals? (A) $1,100 (B) $1,500 (C) $1,137.50 (D) $1,300 bid foorias (A 59

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