The n^(th) term of an arithmetic progression is -11 while sum of the first n terms is 66, when its first term is 22 then the value of n is
The nth term of an arithmetic progression is -11 while sum of the first n terms is 66, when its first term is 22 then the value of n is
A) 12
B) 13
C) 14
D) 15
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