JEE Main 2011 Mathematics question
A man saves Rs. 200 in each of the first three months of his service. In each of the subsequent months his saving increases by Rs. 40 more than the saving of immediately previous month. His total saving from the start of service will be Rs. 11040 after
Answer: (3)
Solution
After 3 months he has saved 600. The next n months give 240, 280, …: . Setting
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