Question

The mean of a set of 6 integers is 30. When one of the numbers is removed, the new mean is

34. What was the number that was removed?

A

Four

B.

Five

С

Eight

D

Ten

Answer 1

Answer: The number that was removed was Ten--- d

Explanation:

Step 1

Mean = Sum of integers/ number of integers

30 = X / 6

Sum of the integers= 180

Step 2

Let n be the number that was removed , so that

Mean = Sum of integers/ number of integers sum will now be written as

34= 180-n / 5

170 = 180-n

n = 180 -170

n= 10