If x + y = 6 , y + z = 7 , and z + x = 9 the average (arithmetic mean) of x , y and z is?
- 11
- 11/3
- 11/2
- None of these
Explanation
Given:
x + y = 6
y + z = 7
z + x = 9
Add the three equations:
2(x + y + z) = 22
Divide by 2:
x + y + z = 11
The average of x, y, and z is:
(x + y + z)/3 = 11/3
Related MCQs
- (x+5)(x−4)/(x−2)(x+2)
- x+5/x+2
- x−4/x−2
- x+5/x−2
اس سوال کو وضاحت کے ساتھ پڑھیں
- 20
- 25
- 30
- 35
اس سوال کو وضاحت کے ساتھ پڑھیں
