Latest TCS Aptitude Question SOLUTION: The average age of all boys in the class is 16.66,while the average age of all girls in the same class is 18.75.Thus the average marks of all 40 students in the class is 17.5.what

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(#M40001015) TCS Numerical Ability question Keep an EYE

The average age of all boys in the class is 16.66,while the average age of all girls in the same class is 18.75.Thus the average marks of all 40 students in the class is 17.5.what is the number of girls in the class?
(a)12(b)16(c)18(d)20 (e)data insufficient

Solution

question will be correct if we use marks in the place of age
ans : x*18.75 + (40-x)*16.66 = 40*17.5
on solving we get x = 16

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Asked In TCS Ragini (13 years ago)

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