1.

The average weight of 18 boys was calculated to be 40 kg. It was later discovered that oneweight was misread as 36 in place of correct weight 53. Calculate the correct mean.

Answer»

Average weight of boys = Total weight of boys/ Number of boys

Then,40 = Total weight of boys/ 18

Total weight of boys = 40*18= 720

But correct weight 53 was misread as 35

Hence,Actual total weight of boys= 720 - 35 + 53= 720 + 18 = 738

Therefore correct mean= 738/18= 41 kg



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