A) 25
B) 28
C) 30
D) 20
Correct Answer: B
Solution :
Given series \[101+99+97+.........+47\] So, first term\[a=101\], common difference \[d=-2\] and last term \[l=47\] We know that last term of a series \[{{T}_{l}}=a+(n-1)d\Rightarrow 47=101+(n-1)(-2)\] \[-54=(n-1)(-2)\Rightarrow n=28\].You need to login to perform this action.
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