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?
b:g = 5:7
b/g = 5/7
given: b=15
15/g = 5/7
cross-multiply
5g = 105
g = 21
so there are 36 students
118
How many 2s are there in 7
To find out the total number of students in Mr. Joiner's class, we can use the given ratio of boys to girls. Let's start by finding the ratio of boys to the total number of students.
The ratio of boys to girls is given as 5 to 7. This means that for every 5 boys, there are 7 students in total.
If there are 15 boys in the class, we can set up a proportion to find the total number of students:
5 boys / 7 students = 15 boys / x students
Now we can solve for x by cross-multiplying:
5x = 15 * 7
5x = 105
Dividing both sides of the equation by 5:
x = 105 / 5
x = 21
Therefore, there are a total of 21 students in Mr. Joiner's class.