At the beginning of an academic year, there were 15 boys in a class and the number of girls was 20% greater. Later in the year, transfer students were admitted such that the number of girls doubled but the number of boys remained the same. How many students are in the class now?
Thoughts? Step-by-step reasoning:
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The original number of girls was 20% greater than 15 (the number of boys) giving 15 + (20 / 100) * 15 = 18. After the admission of transfer students, the number of girls doubled to become 18 * 2 = 36. In addition to the 15 boys, there are now 15 + 36 = 51 students in the class.
Thus, the answer is 51.
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