ssccglapex

What is the sum of the first 12 terms of an arithmetic progression if the first term is -19 and last term is 36?

A. 192 B. 230 C. 102 D. 214 Answer: Option C
Show Answer

Solution(By Apex Team)

First term of AP = a = -19 and last term = l = 36 Number of terms = n = 12 $\begin{aligned}&\text{ Sum of }\mathrm{AP}=\frac{n}{2}(a+l)\\ &=\frac{12}{2}(-19+36)\\ &=17\times6\\ &=102\end{aligned}$

Related Questions On Progressions


How many terms are there in 20, 25, 30 . . . . . . 140?

A. 22
B. 25
C. 23
D. 24
Show Answer

Find the first term of an AP whose 8th and 12th terms are respectively 39 and 59.

A. 5
B. 6
C. 4
D. 3
Show Answer

Find the 15th term of the sequence 20, 15, 10 . . .

A. -45
B. -55
C. -50
D. 0
Show Answer

The sum of the first 16 terms of an AP whose first term and third term are 5 and 15 respectively is

A. 600
B. 765
C. 640
D. 680
Show Answer



More Related Questions On Progressions