Question

5.
The first term of an A.P. is 5 and the last term is 45. If the sum of all the
terms is 400, the number of terms is
(A) 20
(B) 8
(C) 10
(D) 16​

Answer 1

Answer:

option d is correct answer

(D) 16

Answer 2

Answer:

The correct ans. will be Option D ,i.e.16