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Mathematics, 18.09.2021 19:00 ari313

I'm using the weighted mean formula to solve this, but I keep getting the answer 12.5 and can't seem to find what I'm doing wrong. Please explain your answer. Thank you!


I'm using the weighted mean formula to solve this, but I keep getting the answer 12.5 and can't see

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I'm using the weighted mean formula to solve this, but I keep getting the answer 12.5 and can't seem...

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