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The mean of 19 numbers is 17. An extra number is included and the mean increases to 23. What is the extra number?

The mean of 19 numbers is 17. An extra number is included and the mean increases to 23. What is the extra number?
asked 16.1k views
1 vote
The mean of 19 numbers is 17. An extra number is included and the mean increases to 23. What is the extra number?

asked
User Azi
by
8.3k points

1 Answer

5 votes

Answer:

Extra number = (23×20) - (19×17)

= 137

answered
User Dbellizzi
by
9.1k points
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