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[" 8.There were "24" students in a class...

[" 8.There were "24" students in a class.One of "],[" them,who was "18" years old,left the class and "],[" his place was filled up by a newcomer.If the "],[" average of the class was thereby lowered by "],[1" month,the age of the newcomer is: "],[[" (a) "14" years "," (b) "15" years "],[" (c) "16" years "," (d) "17" years "]]

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There were 24 students in a class. One of them, who was 18 years old, left the class and his place was filled up by a newcomer. If the average of the class thereby, was lowered by one month, the age of the newcomer is (a) 14 years (b) 15 years (c) 16 years (d) 17 years

From a class 24 boys, a boy aged 10 years leaves the class and in his place a new boy is admitted .As a result the average age of the class is increased by 2 months. What is the age of the new boys?

The average age of 24 students and the class teacher is 16 years. If the class teacher’s age is excluded, the average reduces by one year. What is the age of the class teacher?

The average age of 30 boys in a class is 15 years. One boy, aged 20 years, left the class, but two new boys came in this place whose age differ by 5 years. If the average age of all boys now in the class becomes 15 years, the age of the younger newcomer is :

The average age of 30 boys in a class is 15 years. One boy aged 20 years, left the class, but two new boys came in his place whose ages differ by 5 years. If the average age of all the boys now in the class still remains 15 years, the age of the younger newcomer is:

The average age of 30 boys in a class is 15 years, One boy , aged 20 years, left the class, but two new boys came in his place whose age differs by 5 years . If the average age of all the boys now in the class becomes 15 years , the age of the younger newcomer is :