Task 19: Solve the following problem:
To solve this problem, we need to follow the given steps:

Given information:
- The total number of students = 45
- The ratio of boys to girls = 3:2

Step 1: Understanding the ratio
- The ratio of boys to girls is given as 3:2.
- This means that for every 3 boys, there are 2 girls.

Step 2: Finding the total number of parts
- The total number of parts in the ratio is 3 + 2 = 5.

Step 3: Finding the number of students in each part
- To find the number of students in each part, we divide the total number of students by the total number of parts.
- Number of students in each part = Total number of students / Total number of parts = 45 / 5 = 9

Step 4: Finding the number of boys and girls
- Number of boys = 3 parts * 9 students = 27
- Number of girls = 2 parts * 9 students = 18
Therefore, there are 27 boys and 18 girls in the class of 45 students, according to the given ratio.