Question

The mean of 5 numbers is 22 . If one number is excluded, then the mean gets reduced by 2 . Determine the excluded number
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Answer 1

Answer:

Mean is the sum of the numbers divided by the total number of values.

Given that the arithmetic mean of 5numbers is 27.

Let the numbers be x1,x2,x3,x4,x5

Therefore, 27=5x1+x2+x3+x4+x5

x1+x2+x3+x4+x5=27×5=135 -------(1)

After excluding one number then the mean is 25

Let the excluded number be x5

Therefore, 25=4x1+x2+x3+x4

x1+x2+x3+x4=25×4=100 ------(2)

subtracting (1) and (2) we get

(x1+x2+x3+x4

Step-by-step explanation:

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