Q8 of 174 Page 571

The mean of 20 numbers is 43. If 6 is subtracted from each of the numbers, what will be the new mean?

Given,


Mean of 20 numbers = 43


Sum of these numbers = 20 × 43 = 860


When, every number is decreased by 6,


Total decrease in sum = 20 × 6 = 120


New sum will be = 860 – 120 = 740


New Mean =


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