SOLUTION: The average of numbers x, y and z is 7 and average of x and y is 5. Value of z is
Algebra.Com
Question 552490: The average of numbers x, y and z is 7 and average of x and y is 5. Value of z is
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
(x+y+z)/3 = 7
x+y+z = 21
------
(x+y)/2 = 5
x+y = 10
----
z = 11
RELATED QUESTIONS
1f x+y =6,y+z =7 and x+z=9, what is the average of x,y and z?
(answered by jim_thompson5910)
the average(arithmetic mean) of x and y is 5 and the average of x, y, and z is 8. What is (answered by nerdybill)
The average of the three numbers x,y,and z is equal to twice the average of y and z. What (answered by solver91311)
The average of x,y,z and 40 is 10. What is the average of x,y and... (answered by jim_thompson5910)
if the average of x, y, and 35 is 20 less than the average of y, z, and 100, what is the... (answered by ankor@dixie-net.com)
If the average of x,y,z,and 90 is 20 less than the average of y,z,w,and 100, what is the... (answered by josgarithmetic,greenestamps)
If x/y=6, y/z=7, and z/x =9, the average (arithmetic mean) of x, y, and z... (answered by richard1234)
If the average of x, y, and z is 32 and the average of y and z is 27, what is the average (answered by prateekagrawal)
The average of A and B is 6. The average of X,Y, and Z is 16. What is the average of... (answered by tommyt3rd)