A) 79
B) 157
C) 82
D) 80
E) 75
Correct Answer: E
Solution :
According to question , \[82=\frac{\left( \begin{align} & 27+x+31+x+89+x+107+x \\ & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,+156+x \\ \end{align} \right)}{5}\] \[\Rightarrow \] \[410=410+5x\] \[\Rightarrow \] \[5x=0\] \[\Rightarrow \] \[x=0\] \[\therefore \]Required mean \[=\frac{\left( \begin{align} & 130+x+126+x+68+x \\ & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,+50+x+1+x \\ \end{align} \right)}{5}\] \[=\frac{130+126+68+50+1}{5}\] \[=\frac{375}{5}=75\]You need to login to perform this action.
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