Question

A math class has a total of 30 students. The number of females is 9 less than the number of males. How many males and how many females are in the class?

Answer 1

Answer:

let x= no. of males in the class

therefore x-9= y =no. of female's

so, according to the question

x+y=30

putting the value of y in above equation

x+x-9=30

2x=39

x= 39/2

x=19.5

putting the value of x in eq. 1

19.5+y = 30

y=10.5