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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, average age of boys in that class increases by 2 months, age of newcomer is :


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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 :

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, average age of boys in that class increases by 2 months, age of newcomer is :

Find the simple interest on Rs. 5200 for 2 years at 6% per annum.

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 :

Averages Aptitude Questions

Arithmetic-Aptitude