In grade 6 there are 3girls for every 2boys if there are 30 girls in the class how many boys are there in the class

No of boys in class = 20 boys

Step-by-step explanation:

Given Data:

 Total number of girls in class = 30

  Ratio of girls to boys in class is 3 : 2

To Find:

   Number of boys in the class=  x=  ?

Solution:            

  Now using the formula of proportion

     Girls               : :              Boys

       30     :     3    : :     x   :   2----------- (1)

   the above equation can be written as

      =  

   calculation leads the equation to

     10  ×   2   =   x

    Hence number of boys in the class is 20

x+y=90

x=30-y=x

step-by-step explanation:

if you understand you will get the answer