A) 75
B) 157
C) 82
D) 80
Correct Answer: A
Solution :
[a] Given \[82=\frac{(27+x)+(31+x)+(89+x)+(107+x)+(156+x)}{5}\]\[\Rightarrow 82\times 5=410+5x\Rightarrow 410-410=5x\Rightarrow x=0\] \[\therefore \] Required mean is, \[\bar{x}=\frac{130+x+126+x+68+x+50+x+1+x}{5}\] \[\bar{x}=\frac{375+5x}{5}=\frac{375+0}{5}=\frac{375}{5}=75\]You need to login to perform this action.
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