Question 268318: The average of 3 numbers is 21. One of the numbers is 10. What is the sum of the other 2 numbers Answer by azhou4(12) (Show Source):
You can put this solution on YOUR website! How can you find the average of something? That's the mean! You do 10+x+y divided by 3 = 21
So
10+x+y/3=21
10+x+y=21*3
10+x+y=63
x+y=53
There's your answer! Hope this helps!
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