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Sapna Sharma · Answer 1 · 2023-07-03T08:24:25+0000

To determine the weighted average of the student's grades, you have to multiply each grade by its corresponding percentage, expressed as a decimal value, and then add the results:

$weighted.average=\Sigma(x_iw_i)$
$\begin{gathered} \text{weighted.average}=93\cdot0.30+94\cdot0.30+84\cdot0.10+78\cdot0.10+94\cdot0.20 \\ weighted\text{ average=}27.9+28.2+8.4+7.8+18.8 \\ \text{weighted average=91.10} \end{gathered}$

The weighted average is 91.10

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