Question

Let s1, s2, s3,…..,s10 respectively be the sum to 12 terms of 10 A.P.s whose first terms are 1,2,3, …. ,10 and the common differences are 1, 3, 5, …. , 19 respectively. Then $10∑^{10}_{i=1} s_i$ is

• A. 7260
• B. 7220
• C. 7360
• D. 7380

Answer 1

Answer: (A)

7260

Answer 2

The correct option is(A): 7260