A) 10
B) 12
C) 11
D) 13
Correct Answer: C
Solution :
Given, \[\frac{2n}{2}\{2.2+(2n-1)3\}=\frac{n}{2}\{2.57+(n-1)2\}\] or \[2(6n+1)=112+2n\] or \[10n=110,\,\,\,\,\,\therefore n=11\].You need to login to perform this action.
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