Question

There are 15 terms in an arithmetic progression. Its first term is 5 and their sum is 390. The middle term is.

• A. 23
• B. 26
• C. 29
• D. 32

Answer 1

Answer: (B)

26

Answer 2

According to the given condition

$\frac { 15 } { 2 } [ 10 + 14 \times d ] = 390$ $\Rightarrow$ $d = 3$

Hence middle term term is given by

$5 + 7 \times 3 = 26$.