55% of the pupils in Sunshine Primary School take the school bus. 20% of the remaining pupils walk to school while the rest take public transport. A total of 1620 pupils take public transport. How many pupils take the school bus?

To solve this problem, we need to work backwards from the information given.

Step 1: We know that 1620 pupils take public transport. These pupils represent 80% of the pupils who do not take the school bus (since 20% walk to school).

Step 2: To find out the total number of pupils who do not take the school bus, we can set up the equation 1620 = 0.80 * X, where X is the total number of pupils who do not take the school bus. Solving for X gives us X = 1620 / 0.80 = 2025 pupils.

Step 3: These 2025 pupils represent 45% of the total number of pupils (since 55% take the school bus). So, to find the total number of pupils, we can set up the equation 2025 = 0.45 * Y, where Y is the total number of pupils. Solving for Y gives us Y = 2025 / 0.45 = 4500 pupils.

Step 4: Finally, to find the number of pupils who take the school bus, we can calculate 55% of the total number of pupils. This gives us 0.55 * 4500 = 2475 pupils.

So, 2475 pupils take the school bus.

To solve this problem, we need to work backwards from the information given.

1. We know that 1620 pupils take public transport. These pupils represent the 80% of students who do not take the school bus (100% - 20% who walk = 80%).

2. To find out the total number of students who do not take the school bus, we divide the number of students who take public transport by 80% (or 0.8).

   1620 / 0.8 = 2025 pupils

3. These 2025 pupils represent the 45% of total students who do not take the school bus (100% - 55% who take the school bus = 45%).

4. To find the total number of students, we divide the number of students who do not take the school bus by 45% (or 0.45).

   2025 / 0.45 = 4500 pupils

5. Now, to find out how many students take the school bus, we calculate 55% of the total number of students.

   55% of 4500 = 0.55 * 4500 = 2475 pupils

So, 2475 pupils take the school bus.