SOLUTION: hannah test grades were 80,85,72 and 92. What is her weighted average if the test grades were weighed 2,4,3 and 2, in that order?

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Question 988459: hannah test grades were 80,85,72 and 92. What is her weighted average if the test grades were weighed 2,4,3 and 2, in that order?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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hannah test grades were 80,85,72 and 92.
What is her weighted average if the test grades were weighed 2,4,3 and 2, in that order?
;
Treat this like there are 11 test, the total of the grade weights
:
A = %282%2880%29+%2B+4%2885%29+%2B+3%2872%29+%2B+2%2892%29%29%2F11
A = %28160+%2B+340+%2B+216+%2B+184%29%2F11
A = 900%2F11
A = 81.8 the weighted average