add these together

27, 28, 30, 34, 36, 38, 39, 40, 41, 42, 44, 45, 45, 48, 50, 52

The sum of all these numbers is 615.

how many numbers

There are 16 numbers in the list.

615 divied by 16

615 divided by 16 is equal to 38.4375 (rounded to four decimal places).