Consider the arithmetic progression 3 , 7 , 11 , … 3, 7, 11, \dots 3 , 7 , 11 , … , and let A n A_n A n denote the sum of the first n n n terms of t...

CAT Medium MCQ

Question

Consider the arithmetic progression

3, 7, 11, \dots

, and let

A_n

denote the sum of the first

n

terms of this progression. Then, calculate the value of

\frac{1}{25} \sum_{n=1}^{25} A_n

404

442

455

415

cat 2022arithmetic progressionalgebrasummationseries