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A classroom has 15 boys and 13 girls. If 10 more girls join the class, what is the ratio of girls to boys?
23 : 15
10 : 15
13 : 15
15 : 23
Detailed Explanation
Initially, the classroom has 15 boys and 13 girls. After 10 more girls join, the number of girls becomes 13 + 10 = 23.
The ratio of girls to boys can be calculated by dividing the number of girls by the number of boys.
The ratio of girls to boys = Number of girls: Number of boys.
Therefore, the ratio of girls to boys is 23:15.
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