Three maths classes: A, B and C take an algebra test. The average score of class A is 83. The average score of class B is 76. The average score of class C is 85. The average score of class A and B is 79 and average score of class B and C is 81. What is the average score of classes A, B, C ?
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81.5 is average score of classes
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Bonjour !!! frnd .
I think answer is 81.2
Hope it helps.
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