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Arithmetic Ability
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Q.
The average age of the boys in a class is 16 years and that of the girls is 15 years. The average age for the whole class is :
A.
15
B.
20
C.
21
D.
data inadequate
View Answer
Correct choice: D
Explanation:
Clearly, to find the average, we ought to know the number of boys, girls or students in the class, neither of which has been given. So, the data provided is inadequate.
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