In a class of 30, the ratio of boys to girls is 2 : 3 , how many girls are there?

In a classroom consisting of 30 students, the distribution of boys and girls is represented by a ratio of 2 to 3. This means that for every 2 boys, there are 3 girls. To determine the number of girls present in this class, one must first understand the total parts represented by the ratio. The sum of the parts in the ratio is 2 (boys) plus 3 (girls), which equals 5 parts in total.

To find the number of students corresponding to each part of the ratio, one can divide the total number of students, which is 30, by the total number of parts, 5. This calculation yields 6, indicating that each part of the ratio represents 6 students. Consequently, to ascertain the number of girls, one must multiply the number of parts allocated to girls, which is 3, by the value of each part, 6.

Therefore, the calculation for the number of girls in the class is as follows: 3 parts multiplied by 6 students per part results in 18 girls. Thus, in a class of 30 students where the ratio of boys to girls is 2 to 3, there are a total of 18 girls present. This analysis not only clarifies the distribution of students but also reinforces the understanding of ratios in practical scenarios.

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