A) 10
B) 11
C) 12
D) None of these
Correct Answer: B
Solution :
\[11+(11+d)+(11+2d)+(11+3d)=56\] \[\Rightarrow \]\[d=2\] and \[\{11+(n-1)2\}+\{11+(n-2)2\}\] \[+\{11+(n-3)2\}+\{11+(n-4)2\}=112\] \[\Rightarrow \]\[n=11\].You need to login to perform this action.
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