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Q.
The average age of a group of 10 students is 15 years. When 5 more students join the group, the average age increase by 1 year. The average age of the new student is?
View Answer
Correct choice:
Explanation:
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 = 90/5 = 18 years.
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