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The average of the marks of maths test of 20 students is 9. If the marks of...............What is the new average marks?

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The average of the marks of maths test of 20 students is 9.
If the marks of 5 new students are 9,5,3,2,1.
What is the new average marks?

posted Apr 20, 2021 by Aastha Joshi

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