Question

The average of 3 numbers is 45. If one of the numbers is 43, what is the average of the other 2 numbers?

The average of 3 numbers is 45 means the total = 45 x 3 = 135? is that what u suppose to do?
If one of the numbers is 43, the total of the other two=_______________=______??
.: the average of the other two numbers=______________=________??

45*3= 43 + 2 avg solve for avg.

Answer 1

Hello! I know I am really late, but anybody could use the formula to find average.
Let’s assume three numbers as x, y, and z.

Formula for average:
x + y + z
—————————
number of numbers (x, y, z = 3 numbers)

So let’s say that x + y + z = n.
n
—— = a
3

a is the average of x, y, and z.

Now I’ll show an example problem

Example: Find the average of 55, 57, and 58.

55 + 56 + 57 168
—————— = ————————— =
3 3
(150/3) + (18/3) = 50 + 6 = 56

Answer 2

Excuse me, my example problem got messed up! Hope you can understand the formula.