The mean of 'x+y' observations is 'x-y'.Find x and y?
Answers
Answered by
0
sum of x+y observations = (x+y) * (x-y) = x² - y²
that is what we can find. we know x and y are probably positive integers.
we cannot find x and y values without more information.
It is possible that the average of x observation is x, the average of some other y observations is -y. So their sum is x* x + y * (-y) = x² - y² .
In that case the overall mean of x+y observations is x-y.
that is what we can find. we know x and y are probably positive integers.
we cannot find x and y values without more information.
It is possible that the average of x observation is x, the average of some other y observations is -y. So their sum is x* x + y * (-y) = x² - y² .
In that case the overall mean of x+y observations is x-y.
Answered by
0
We know that Mean is equal to
Mean=sum of terms/total no. terms
As given
x-y=x+y/1
1 (x-y)=x+y
x-y=x+y
x-y-x-y=0
-2y=0
So y=0 and x=1
Mean=sum of terms/total no. terms
As given
x-y=x+y/1
1 (x-y)=x+y
x-y=x+y
x-y-x-y=0
-2y=0
So y=0 and x=1
Similar questions