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The average of nine number is 50. The average of first five numbers is 54 and that of last three numbers is 52. Then sixth number is :


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The average age of group of 20 girls is 15 years and that of another group of 25 boys it is 24 years. The average age of the two groups mixed together is :

The average of nine number is 50. The average of first five numbers is 54 and that of last three numbers is 52. Then sixth number is :

From a class of 42 boys, a boy aged 10 years goes away and in his place, a new boy is admitted. If on account of this change, the average age of the boys in that class increases by 2 months, the age of the newcomer is :

The average of nine number is 50. The average of first five numbers is 54 and that of the last three numbers is 52. Then the sixth number is :

Averages Aptitude Questions

Arithmetic-Aptitude