A) 130
B) 110
C) 120
D) 140
Correct Answer: C
Solution :
\[\sum n=\frac{n(n+1)}{2}\] \[n=15\] Here Then, sum of the first 15 natural numbers \[=\frac{15\times (15+1)}{2}\] \[=\frac{15\times 16}{2}=120\]You need to login to perform this action.
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