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Question : 6 of 40
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The average age of 15 students of a class is 15 years. Out of these the average age of 5 students is 14 years and that of the other 9 students is 16 years. The age of the 15th student is:
15
2
7
15\frac{2}{7}
15
7
2
​
years
15 years
14 years
11 years
Validate
Solution:
The age of the 15th student = 15 × 15 – (5 × 14 + 9 × 16) = 225 – 214 = 11 years
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