Question

The mean of 40 items is 35 and if each item is multiplied by ‘a’ then the new mean will be

(A) 35 a (B) 35 + a C) 40 D) 40 + a

Answer 1

Answer:

ans will be 35a

Step-by-step explanation:

when we will multiply 35 with 'a' then ans is 35a the question is saying to multiply 35×a not 40×a so on

Answer 2

The mean of 40 items is 35 and if each item is multiplied by ‘a’ then the new mean will be (A) 35a

Step-by-step explanation:

Given:

mean of 40 items= 35

each term is multiplied by a

To find:

mean after each term is multiplied by a

Solution:

The mean of 40 observations is 35

∴ Total of 40 items= 40 X 35

∴ Total of 40 items= 1400

If each term or item is multiplied by a then the total will be 1400 X a

Now, the mean of these observations= sum of these observations

                                                                 number of observations

Mean= 1400 X a/ 40

∴ Mean= 35a  

Thus, the mean of those 40 items will be 35a.

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