Question

3. The mean of four numbers is 30. If three of the numbers are 12, 50, and 48, what is the fourth

number?
O 120
O 10
012
030

Answer 1

The sum of the four numbers divided by 4 is equal to the mean.

the sum/4 = mean

(12 + 50 + 48 + n)/4 = 30

(110 + n)/4 = 30

(110 + n) = 30 × 4

(110 + n) = 120

n = 120 - 110

n = 10

Answer 2

12 10 12 30

Explanation:

eso se devide y es 1.030