SOLUTION: The average of 25 numbers is 18. The average of first 12 numbers is 14 while that of last 12 is 17. What is the thirteenth number?
Options
- 78
- 87
- 92
- None of these
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-> SOLUTION: The average of 25 numbers is 18. The average of first 12 numbers is 14 while that of last 12 is 17. What is the thirteenth number?
Options
- 78
- 87
- 92
- None of these
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Question 980651: The average of 25 numbers is 18. The average of first 12 numbers is 14 while that of last 12 is 17. What is the thirteenth number?
Options
- 78
- 87
- 92
- None of these Answer by josgarithmetic(39629) (Show Source):
You can put this solution on YOUR website! 12*14+12*17, is twenty four numbers. Your question asks for a number as if it were arranged between these two groups of twelve.
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