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Question

How many boys are there in the class?
I. The number of girls is 30% of the number of boys.
II. The ratio of the number of boys to that of girls is 3:5.

A If the data in statement I alone are sufficient to answer the question, while the data in statement II alone are not sufficient to answer the question.
B If the data in statement II alone are sufficient to answer the question, while the data in statement I alone are not sufficient to answer the question.
C If the data either in statement I alone or statement II alone are sufficient to answer the question.
D If the data in both statement I and II together are not sufficient to answer the question.
E If the data in both statement I and II together are necessary to answer the question.
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