Question 883588
To find an average simply add up all the numbers in the group and divide the result by the amount of numbers in that group. 

Here you have a group of 2 numbers: 24 and 50.

To find their average you need to add them up and then divide the result by 2 (because that is amount of numbers in that group).

So... 24 + 50 = 74

74/2 = 37

Voila!