there are 175 pupils in the hall, 40% of them are boys, 25 girls enter the hall. What percentage of the pupils in the hall now are boys
175 * 0.4 = 70 boys
175+25 = 200 students of which 70 are boys and 130 are girls
70/200 * 100 = 35%
Well, let's do some math, but with a twist of humor!
Initially, we had 175 pupils in the hall. But wait, here come the girls! They storm in with all their girl power, a total of 25 of them. So now we have 200 pupils in total.
But you want to know the percentage of boys, not girls! No worries, my friend. We know that 40% of the original 175 pupils were boys. So, 40% of 175 is 70 boys.
Now, let's calculate! We have 70 boys, 25 girls, and a grand total of 200 pupils in the hall. To find the percentage of boys, we divide the number of boys by the total number of pupils and multiply by 100.
So, (70 boys ÷ 200 total pupils) × 100 = 35.
Thus, the percentage of boys in the hall now is 35%. That's more boys than you can shake a whoopee cushion at!
To find the percentage of boys in the hall after 25 girls enter, we need to calculate the new number of boys and divide it by the total number of pupils.
Step 1: Calculate the number of boys in the hall before 25 girls enter.
40% of 175 pupils = (40/100) * 175 = 70 boys
Step 2: Calculate the new total number of pupils after 25 girls enter the hall.
175 pupils + 25 girls = 200 pupils
Step 3: Calculate the new percentage of boys.
New number of boys = 70 boys
New total number of pupils = 200 pupils
Percentage of boys = (New number of boys / New total number of pupils) * 100
Percentage of boys = (70 boys / 200 pupils) * 100
Percentage of boys = 35%
Therefore, the percentage of boys in the hall after 25 girls enter is 35%.
To find out what percentage of the pupils in the hall are boys, we can follow these steps:
Step 1: Calculate the number of boys in the hall.
Given that there are 175 pupils in the hall and 40% of them are boys, we can calculate the number of boys as follows:
Number of boys = (40/100) * 175 = 70
Step 2: Add the number of boys to the total number of pupils.
Since 25 girls entered the hall, we need to add this number to the existing number of pupils in the hall to find the new total:
New total number of pupils = 175 + 25 = 200
Step 3: Calculate the percentage of boys in the hall.
To find the percentage, we divide the number of boys by the new total number of pupils and multiply it by 100:
Percentage of boys = (number of boys / new total number of pupils) × 100
Percentage of boys = (70 / 200) × 100 = 35%
Therefore, after 25 girls entered the hall, 35% of the pupils in the hall are boys.