PRC-2 · Chapter 3 · Question 19 of 45
A person's savings plan is structured as a geometric progression. They save Rs. 200 in month 1, Rs. 100 in month 2, Rs. 50 in month 3, and so on. What is the total amount saved at the end of exactly 5 months?
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: A) Rs. 387.5
Explanation
This is a finite GP sum where a = 200, r = 0.5, and n = 5. Using S = a(1 - r^n) / (1 - r): S = 200(1 - 0.5^5) / 0.5 = 400(1 - 0.03125) = 400(0.96875) = Rs. 387.5.
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