The number of boys in a school is 120. If the ra too of boys to girls is 2:3, find the total number of student in the school
Let's assume the number of girls in the school is "x". Since the ratio of boys to girls is 2:3, we can express this as 2/3 = 120/(x+120).
Cross multiplying this equation, we have 2(x+120) = 3(120).
Expanding the equation, we get 2x + 240 = 360.
Subtracting 240 from both sides, we have 2x = 120.
Dividing both sides by 2, we get x = 60.
Therefore, the total number of students in the school is 120 + 60 = 180.