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Multiple Choice Questions

The average age of a group of 10 students is 20 years When 5 more students join the group the averag...........

Elelmentary Mathematics (UPPCS) Problems based on Ages

The average age of a group of 10 students is 20 years. When 5 more students join the group, the average age increase by 2 year. The average age of the new students is?

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Explanation:

Solution:
Total age of 10 students = (10*20) 200
Total age of 15 students = (15*22) 330
Total age of 5 new students = 330 – 200 = 130 years
Then average age of 5 new students = 130/5= 26 years

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