SOLUTION: The average (arithmetic mean) of r, s, x and y is 8, and the average of x and y is 4. what is the average of r and s? a)4 b) 6 c) 8 d) 12

Question 782492: The average (arithmetic mean) of r, s, x and y is 8, and the average of x and y is 4. what is the average of r and s?
a)4
b) 6
c) 8
d) 12
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
The average (arithmetic mean) of r, s, x and y is 8,

.......eq.1
and the average of x and y is 4

.....eq.2..substitute in eq.1
.......eq.1

the arithmetic mean will be
so, your answer is )

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