Question

The ${20}^{th}$ term of the arithmetic progression $10,7,4$, ....... is

• A. $-57$
• B. $47$
• C. $-47$
• D. $67$

Answer 1

Answer: (C)

$-47$

Here, $a=10,d=-3$

$a_{20}=a+19d$

$=10+19(-3)$

$=10-57=-47$