If x is the average of 4a and 26, y is the average of 5a and 36..........What is the average of x,y and z in terms of a?

Question

If x is the average (arithmetic mean) of 4a and 26, y is the average of 5a and 36 and z is the average of 3a and 28.
What is the average of x,y and z in terms of a?

Answer 1

x = 2a + 13
y = 2.5a + 18
z = 1.5a + 14
Average of x, y & z = ((2 + 2.5 + 1.5)a + 45)/3
= 2a + 15.