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14. Statistic
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Q10 of 174 Page 571

The mean of 12 numbers is 40. If each number is divided by 8, what will be the mean of the new numbers?

Given,


Mean of 12 numbers = 40


Sum of these numbers = 12 × 40 = 480


When each number is divided by 8


The new sum becomes =


New mean =


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8

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

9

The man of 15 numbers is 27. If each number is multiplied by 4, what will be the mean of the new numbers?

11

The mean of 20 numbers is 18. If 3 is added to each of the first ten numbers, find the mean of the new set of 20 numbers.

12

The mean weight of 6 boys in a group is 48 kg. The individual weights of five of them are 51 kg, 45 kg, 49 kg, 46 kg and 44 kg. Find the weight of the sixth boy.

Questions · 174
14. Statistic
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