Question Detail
Question
Find the sum of the first 200 terms of the arithmetic progression 1.1, 1.2, 1.3, ...
Correct Answer
Option A is the correct answer.
Detailed Explanation
a=1.1, d=0.1, n=200. S_n = 200/2[2.2+19.9] = 100×22.1 = 2210.
Hint
Multiply carefully with decimals.