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If on a test three people answered 90% of the questions correctly and two people answered 80% correctly, then find weighted average?

81
86
88
90
Explanation:

Weighted Average= $\dfrac{Sum \;of \;Weighted \;Terms}{Total \; Number\; of \;Terms}$

Weighted Average= $\dfrac{3×90+2×80}{5}$

Weighted Average= $\dfrac{430}{5}$

=86

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