The ratio of boys to girls in Mr. Joiner’s class is 5 to 7. If there are 15 boys in the class, how many total students are in the class?
Let x = the number of girls.
Cross multiply and solve for x.
5/7 = 15/x
Add the number of boys and girls together.
15 boys is three times the number of boys originally, so there are 21 girls, meaning there is a total of 36 students.
5+7=12
To find the total number of students in the class, we need to determine the number of girls in the class.
Given that the ratio of boys to girls is 5 to 7, we can set up a proportion using the information provided:
boys / girls = 5 / 7
We know that there are 15 boys, so we can substitute this value into the proportion:
15 / girls = 5 / 7
To solve for the number of girls, we can cross-multiply:
7 * 15 = 5 * girls
105 = 5 * girls
Dividing both sides of the equation by 5, we find that:
girls = 105 / 5
girls = 21
Now that we know the number of boys and girls in the class, we can calculate the total number of students:
total students = number of boys + number of girls
total students = 15 + 21
total students = 36
Therefore, there are 36 students in Mr. Joiner's class.