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The average of 9 numbers is 140. One of the numbers is 180. What is the average of the other 8 numbers?

The average of 9 numbers is 140. One of the numbers is 180. What is the average of the other 8 numbers?
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3 votes
the average of 9 numbers is 140. One of the numbers is 180. What is the average of the other 8 numbers?

User Geoff Adams
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2 Answers

2 votes
The answer is 135.
You can assume that all the other numbers are the same. So (8x + 180)/9 = 140. Isolate x to get 135. Then that is the average because if you had 8(135)/8 it would just be 135
User Ron Maupin
by
7.7k points
6 votes
Hello,

(9*140-180)/8=147.5
================
User Robert Petermeier
by
8.3k points
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