Question

The average of a set of 4 numbers is 20. The average of another set of 6 numbers is 74. What is the average of the 10 numbers?

Answer 1

Let

x-------> the sum of the 4 numbers in the average 1

y-------> the sum of the 6 numbers in the average 2

we know that

x/4=20----------> x=20*4=80

y/6=74----------> y=6*74=444

so

The average of the 10 numbers is equal to

(x+y)/10=(444+80)/10----------> 52.4

therefore

the answer is

the average of the 10 numbers is 52.4