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If the mean of 10 observations is 20 and that of another 15 observations is 16. Find the mean of all 25 observations?

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What is the fees for peivate tuition for 10th State board and CBSE board for Mathematics?

Depending upon the area in which you are going to give classes but according to me it should be at least â?¹6000-7000 per month
Shyam Cholera

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