The first term of an arithmetic progression is 5 and its common difference is 5

MATHEMATICS · Single correct · CBSE · Mathematics · Arithmetic Progressions · Arithmetic Progressions

Problem

The first term of an arithmetic progression is 5 and its common difference is 5. How many terms of the progression must be taken so that their sum is 275? (a) 7 (b) 11 (c) 10 (d) 9

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