Math, asked by arya161487, 2 months ago

Q.20. The first group has 100 items with mean 45 and variance 49. If the combined group has 250 itmes with
mean 51 and variance 130, find the mean and standard deviation of second group. solve full question

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Answered by sharma78savita

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$here \: is \: the \: answer \: in \: 3 \: pics$

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