The median of the set (n, n+5, n+6, n+9, n+15) is 9. What is the mean?

=9.4

Step-by-step explanation:

The median is the middle of the numbers when lined up from smallest to largest

(n, n+5, n+6, n+9, n+15)

The median is n+6

n+6 = 9

Subtract 6 from each side

n + 6-6 = 9-6

n = 3

The numbers are

(n, n+5, n+6, n+9, n+15)

3, 8,9,12, 15

The mean is where you add up all the numbers and divide by the number of numbers

mean = (3+8+9+12+15) / 5

= (47) / 5

= 9 2/5

=9.4