If a quarter of the children in a class are boys, then three quarters must be girls. This means that the fraction of girls in the class is 3/4. In other words, out of every 4 children in the class, 3 are girls.
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The total number of students in the class is 18 boys + 7 girls = 25 students. The fraction of the class that are girls is calculated by taking the number of girls (7) and dividing it by the total number of students (25), resulting in 7/25. Therefore, the fraction of the class that are girls is 7/25.
To determine the fraction of girls and boys in the class, you would need to know the total number of students in the class and the number of girls and boys. Let's say there are 20 students in the class, with 12 girls and 8 boys. The fraction of girls in the class would be 12/20 or 3/5, and the fraction of boys would be 8/20 or 2/5.
Since there are 2 boys and 3 girls there are 3 girls in a class of 5. For a class of 30 there is thus 3/5 times 30 = 18 girls John
two thirds
Boys: 12/30 = 2/5 Girls: 18/30 = 3/5