If the mean 4,7,x,yand8then find the value of x+y
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Solution :
mean of 4 , 7 , x , y is 8.
( 4 + 7 + x + y )/4 = 8
=> 11 + x + y = 32
=> x + y = 32 - 11
=> x + y = 21
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mean of 4 , 7 , x , y is 8.
( 4 + 7 + x + y )/4 = 8
=> 11 + x + y = 32
=> x + y = 32 - 11
=> x + y = 21
••••
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