the arithmetic mean of 10,20,X,40,50 is 30. then X=?
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Answer:
mean = sum of all numbers / total no. of numbers
mean = 30
so ,,
30 = 10+20+x+40+50/ 5
30 = 120 + x / 5
30*5 = 120 +x
150 = 120 + x
150 - 120 = x
30 = x
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hope this helps you dear ...
itz shivani ...
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