Question
If the mean of the number 27+x,31+x,89+x,107+x,156+x is 82, then the mean of 130+x,126+x,68+x,50+x,1+x is
Answer: Option A
:
A
Given,
82=(27+x)+(31+x)+(89+x)+(107+x)+(156+x)5
⇒82×5=410+5x⇒410−410=5x⇒x=0
∴Required mean is,
¯¯¯x=130+x+126+x+68+x+50+x+1+x5
¯¯¯x=375+5x5=375+05=3755=75.
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:
A
Given,
82=(27+x)+(31+x)+(89+x)+(107+x)+(156+x)5
⇒82×5=410+5x⇒410−410=5x⇒x=0
∴Required mean is,
¯¯¯x=130+x+126+x+68+x+50+x+1+x5
¯¯¯x=375+5x5=375+05=3755=75.
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