Question

The mean of five numbers is 8. If one of the five numbers is removed, the mean becomes 9. What is the value of the number that was removed

Answer 1

Using the mean concept, it is found that the value of the number that was removed was of 4.

What is the mean?

The mean of a data-set is given by the sum of all observations in the data-set divided by the number of observations.

The mean of five numbers is 8, hence, the sum of the numbers is given by:

S = 5 x 8 = 40.

If one of the five numbers is removed, the mean becomes 9, hence, the sum of the four numbers is given by:

S = 4 x 9 = 36.

The difference is:

40 - 36 = 4.

Hence, the value of the number that was removed was of 4.

More can be learned about the mean concept at brainly.com/question/25122507

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