A math problem: There are 1 10 students in the fifth grade of Hongxing Primary School, and the number of boys is 1.2 times that of girls. How many boys and girls are there?
Female students:110 ÷ (1+1.2) = 50.
Male: 1 10-50=60.
2. Girls have X, boys1.2x.
x+ 1.2x= 1 10
2.2x= 1 10
x= 1 10÷2.2
x=50
50 girls and 60 boys.