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The mean expanse of a batch of 20 boys is Rs. 8200 per month and that for a................What is the combined expanse?

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The mean expanse of a batch of 20 boys is Rs. 8200 per month and that for a batch of 30 girls is Rs. 7200 per month.
What is the combined expanse?

posted Dec 24, 2020 by Ujjwal Mehra

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