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24-06-2021
Mathematics

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how can i solve it
which method or way should I use
............. ..

how can i solve it which method or way should I use class=

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24-06-2021

Aliaa got a mark of 60 in her first 4 tests, so her total mark is 60 x 4 = 240. On her fifth test, she got a mark of 80.
So her average is:
(240+80)/5 = 320/5 = 64
Her avg is 64 (c).

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