Question

Gabby has the following data, but is missing a value.
15, 12, 12, X, 9, 15
If the mean of the data is exactly 13, what does the value of x have to be?

Answer 1

Answer:

X=15

Step-by-step explanation:

X equals 15 because if you add all the values and divide them by the number of values

you get 13

Answer 2

Answer:

15

Step-by-step explanation:

15+12+12+9+15+ X = 13 *6 (as there are 6 values)

=63+X=78

78-63= X

15=X