Same chapter3 marksDifficulty: Medium
A man saves ₹200 in the first month and ₹50 more in each following month. Find his total saving in one year.
Arithmetic and Geometric Progression
3 marksDifficulty: Medium
Find the sum of the first 20 terms of the arithmetic progression 5, 9, 13, …
Original Khojo Papers practice question — not from a past board paper.
Answer
860
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Here a = 5 and d = 4. Sn = n/2 [2a + (n − 1)d] = 10[10 + 19×4] = 10 × 86 = 860.
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