If the mean of the 20 observation is 17. If 25 is added in the sum of observations. Find the mean.
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The answer is 20/17+25
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mean of 20 objervations= 17
sum of 20 objervations = 20×17
= 340
according to question
25 is added in the sum of objervations
= 340+25
= 365
I hope it help you
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