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Question

need help on this.

3 boys, Adrian, bobby and calvin learnt to make some cookies.
they made an average of 138 cookies
Adrian and bobby made an average of 136 cookies, bobby and calvin made and average of 125 cookies. How many cookie did each of the boy made?

I forgotten how to do average already

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Answer

Avg (A, B, C) -> 138
Total (A, B, C) -> 138 x 3 = 414

Avg (A, B) -> 136
Total (A, B) -> 136 x 2 = 272

C made (414 – 272) = 142 cookies

Avg (B, C) -> 125
Total (B, C) -> 125 x 2 = 250

B made (250 – 142) = 108 cookies

A made (272 – 108) = 164 cookies

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