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The sum of first $n$ terms of an A.P. is $50/2$. If the first and the last terms are $\sqrt{2}$ and $19\sqrt{2}$ respectively, then the value of $n$ is :
- (a)$10$
- (b)$15$
- (c)$5$
- (d)$20$
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Answer: (B) $5$
The sum of first n terms of an A.P. is 50/2 . If the first and the last terms are √2 and 19√2 respectively, then the…
CBSE Class 10 Maths PYQ · Arithmetic Progressions · Sum Formula · 1 Mark · March 2026 · Basic
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