Mathematics, 06.12.2021 17:20 wendyar79

A group of pupils calculated their average score for a Mathematics test. If one of them scored 9 marks more, their average score would
be 81. If one of them scored 3 marks less, their average score would
be 78. How many pupils were there in the group?

Answers: 2

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A group of pupils calculated their average score for a Mathematics test. If one of them scored 9 m...