if there are 30 students in the classroom,and the ratio for boys to girls is 4:6,how many boys and girls are in the class

Let x represent the boys in the classroom. Cross multiply and solve for x.

4/10 = x/30
10x = 120
x = 12

To determine the number of boys and girls in the classroom, we need to find out the value of each part of the ratio. In this case, we know that the ratio of boys to girls is 4:6.

Step 1: Add the two parts of the ratio (4 + 6) to find the total number of parts.
4 + 6 = 10

Step 2: Divide the total number of students in the classroom by the total number of parts of the ratio.
30 students / 10 parts = 3 students per part

Step 3: Multiply the result by each part of the ratio to find the number of boys and girls.
3 students/part x 4 parts (boys) = 12 boys
3 students/part x 6 parts (girls) = 18 girls

Therefore, there are 12 boys and 18 girls in the classroom.