Question

the average of 4 terms is 20 and the 1 st terms is 1/3 of the remaining terms what will be the first number​

Answer 1

Average of 4 terms = 20

Hence, the total sum of 4 terms = 80

Let terms be A,B,C,D

So, the sum will be A+B+C+D =80

Given, 3A = B+C+D

So,

4A = 80,

A = 80/4

A = 20