find the number of students above twelve years of age in your class then, find the ratio of number of student with age above twelve years and remaining students
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Total age of 10 students = 150 years
Total age of 15 students = 240 years
Total age of 5 new students = 240 - 150 = 90 years
 Average age of 5 new students =  = 18 years
Filed Under: Problems on Ages - Quantitative Aptitude - Arithmetic Ability
suma12:
brother I dindnt understand your answer
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