Answer:
21
Step-by-step explanation:
n, n + 2, n+3, n+5, n+7, n+8, n+11, n+14, n+16, n+19
The median is the middle number
There are 10 numbers so the middle is between the 5th and 6th number
n, n + 2, n+3, n+5, n+7, n+8, n+11, n+14, n+16, n+19
We average those two numbers
(n+7 + n+8)/2 = 20
(2n+15) / 2 = 20
Multiply by 2
2n+15 = 40
Subtract 15
2n = 25
Divide by 2
n = 25/2
n = 12.5
We want to find the mean, which is add up all the numbers and divide by the number of numbers
(n+ n + 2+ n+3+ n+5+ n+7+ n+8+ n+11+ n+14+ n+16+ n+19)/10
(10n+85)/ 10
n+ 8.5
12.5 + 8.5 = 21
