Question

The average of 4 terms is 20 and the 1st term 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 = 20

Answer 2

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 = 20

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