Question

Given the regression equation 3x+5y=34 & 5x+3y=30 then find the following
a) Mean of x and y ​​

Answer 1

Answer:

Mean of x and y is 4.

Step-by-step explanation:

We have:

3x+5y= 34 ...............(i)

5x+3y= 30 ...............(ii)

Adding (i) and (ii) we get

8(x+y)= 64

or, x+y= 8

$\frac{x + y}{2} = \frac{8}{2} \\ \frac{x + y}{2} = 4.$

i.e. the mean of x and y is 4.

Answer 2

Answer:

the answer is 4.

Step-by-step explanation:

3x+5y=34======>1

5x+3y=30=====>2

from both 1 and 2,

8(x+y)=64

x+y=8

x+y by 2=8

_

2

x+y=4