Math, asked by taniasingh430, 10 months ago

Mean of 20 observations is 22. And mean of first 10 observations is 15 and mean of last 10 observations is 24. Find the 10th observations

Answers

Answered by raisushila1980

2

sum of 20 observation= 22*20=440

sum of first ten observation =15*10=150

sum of last ten number =440-150=290

mean of last ten number= 290/29=29

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