A) 40
B) 45
C) 51
D) Cannot be determined
Correct Answer: B
Solution :
We know that, sum of terms of an AP series \[\text{=}\,\,\left[ \frac{\text{First}\,\text{term}\,=\text{Last}\,\text{term}}{\text{2}} \right]\,\,\text{ }\!\!\times\!\!\text{ }\,\text{Number}\,\text{of}\,\text{terms}\] \[=2950\] \[\Rightarrow \] \[\left( \frac{4+128}{2} \right)\times \,n=2970\] \[\therefore \] \[n=45\]You need to login to perform this action.
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