Question

If 25 is the arithmetic mean between x and 46, then find x.

Answer 1

We know that the arithmetic mean of two numbers x and y is $A=\frac{x+y}{2}$.
We know:
y = 46 and A = 25
Thus, we get:

$25=\frac{x+46}{2}$

$\Rightarrow$ x + 46 = 50
$\Rightarrow$ x = 50 – 46 = 4