if the ratio of boys to girls is 5:4 and there are 135 student how many are girls
45
60
To determine the number of girls, we first need to find the total number of parts in the ratio. In this case, the ratio is 5:4, which means there are a total of 5 + 4 = 9 parts.
Next, we need to determine the value of each part. To do this, we divide the total number of students (135) by the total number of parts (9):
135 / 9 = 15
Each part represents 15 students.
Since we are looking for the number of girls, we can multiply the number of parts for girls (4) by the value of each part (15):
4 × 15 = 60
Therefore, there are 60 girls in the group of 135 students.
Cross multiply and solve for x.
4/9 = x/135