A) 15000
B) 15025
C) 15050
D) 25000
Correct Answer: C
Solution :
101+102 + 103 +.....+ 200 S = (100 + 1) + (100 + 2) + (100 + 3) +....+ (100 + 100) Thus, it consists of 100 terms. = (100 + 100 + 100 + .... .100 times) + (1 + 2 + 3 +......+ 11 \[=(100\times 100)+(1+2+3+...+100)\] \[=(10000)+(1+2+3+...+100)\] \[=1000+\frac{100\times (100+1)}{2}\] \[=10000+5050=15050\]You need to login to perform this action.
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