Question

the mean of five numbers is 30 if one nimber is excluded their mean becomes 28 find expacted number?​

Answer 1

38

Explanation:

Steps to determine answer

1. determine the sum of the 5 numbers. this can be achieved by multiplying 5 by their mean
2. Derive the sum of numbers for the 4 numbers
3. Subtract the answer gotten from step 2 above from the answer gotten in step 1

Mean = sum of numbers / total number

30 = sum of numbers / 5

sum of numbers = 30 x 5 = 150

28 = sum of numbers / 4

Sum of numbers = 28 x 4 = 112

Difference = 150 - 112 = 38