In a class, there are 22 students whose average age is decreased by three months, when one student aged 21 years is replaced by a new student, find the age of the new student.

14 years 3 months

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15 years 8 months

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14 years 6 months

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15 years 6 months

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15 years 3 months

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Solution

The correct option is D
15 years 6 months

Age of new student = Age of removed student - Numbers of students * Decrease in average age = 21 - 22 x (3 / 12) = 186 / 12 = 15 years 6 months.

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In a class, there are 22 students whose average age is decreased by three months, when one student aged 21 years is replaced by a new student, find the age of the new student.

The correct option is D 15 years 6 months Age of new student = Age of removed student - Numbers of students * Decrease in average age = 21 - 22 x (3 / 12) = 186 / 12 = 15 years 6 months.

The correct option is D
15 years 6 months

Age of new student = Age of removed student - Numbers of students * Decrease in average age = 21 - 22 x (3 / 12) = 186 / 12 = 15 years 6 months.