Multiple choice

A person saved Rs. 16500 in ten years. In each year after the first year he saved Rs 100 more than he did in the preceding year. The amount of money he saved in the 1st year was

  1. 1000

  2. 1500

  3. 1200

  4. None of these

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Annual savings form an AP with sum 16500 over 10 years. S_10 = 10/2[2a + 9d] where d = 100. So 16500 = 5[2a + 900], giving 2a + 900 = 3300, therefore 2a = 2400 and a = 1200.