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OpenStudy (anonymous):
find the weighted average: 15 occurs 3 times, 18 occurs 1 time, 20 occurs 5 times, and 80 occurs 1 time.
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hero (hero):
\[\frac{15(3) + 18(1) + 20(5)+80(1)}{3 + 1 + 5 + 1}\]
OpenStudy (anonymous):
so the answer is?
hero (hero):
24.3
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