Correct Answer - Option 1 : 1050
CONCEPT:
CALCULATION:
Given that : a = 10, a20 = 200.
As we know that an = a + (n – 1) d.
⇒ 200 = 10 + (20 - 1) × d
⇒ d = 10
Again \(\rm S=\rm\frac{n}{2}[2a+(n-1)d]\)
⇒ S14 = 1050
Hence, option (1) is the correct answer.