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

CORRECT ANSWER : 78

Discussion Board
Maths

Pls give answer with Details

Surangma 03-31-2015 12:51 AM

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