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