Homework Help: math

Posted by joe-c on Sunday, November 16, 2008 at 1:12pm.

A class of 43 students took an exam. They had a mean average of 67 and a standard deviation of 7.
a) how many students got a c
b) how many students got a b
c) what is a scoree needed to get an a

is a) 4 b) 1 c) 90

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