The high school marching band has a total of 100 students. There are 3 times as many girls in the band as boys. How many girls are in the band?

Question

anonymous · Answer

60 maybe

anonymous · Answer

Write an equation, with x = no. of boys.  Since there are 3times as many girls, there should be 4x total people in the band. 
4x  = 100
Solve for x to get the number of boys.  Then multiply that by 3 to get the number of girls.

anonymous · Answer

Let b and g be the number of boys and girls respectively.
Solve the following for b and g.$$\left\{b+g=100,\frac{g}{b}=3\right\} $$$$\{b=25,g=75\} $$