The average age of a class of 60 students is 12 years If the number of girls is increased by

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The average age of a class of 60 students is 12 years. If the number of girls is increased by 3/4th and the number of boys is decreased by half, the total number of students does not change; nor does the average age of either the boys or the girls change. But the combined average age changes to 13.5 years. The average age of the boys is
Option
(a) 8 years
(b) 10 years
(c) 12 years
(d) Cannot be determined: Asked In Exam AVIJIT (10 years ago); Unsolved; Is this Puzzle helpful? (3) (11) Submit Your Solution Averages

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Latest Exam Aptitude Question SOLUTION: The average age of a class of 60 students is 12 years. If the number of girls is increased by 3/4th and the number of boys is decreased by half, the total number of students does n

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