SOLUTION: The boy : girl ratio in a school is 4:5, if there are 225 girls, how many students are in the school?

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Question 657422: The boy : girl ratio in a school is 4:5, if there are 225 girls, how many students are in the school?
Answer by shweta(56) About Me  (Show Source):
You can put this solution on YOUR website!
Boy:Girl= 4:5
Total number of students= x
Boys= (4/9)*x
Girls=(5/9)*x = 225
5x/9 = 225
5x = 225*9
x = (225*9)/5= 405
Total number of students= 405