Answer:
38
Step-by-step explanation:
Steps to determine answer
- determine the sum of the 5 numbers. this can be achieved by multiplying 5 by their mean
- Derive the sum of numbers for the 4 numbers
- 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
