In a class, 37% of the students are girls. There are 20 boys in the class. What is the number of girls in the class?
37% girls means 63% boys. So,
g/b = g/20 = 37/63
g = 11.7
So, I suspect that there are 12 girls, making 62.5% of the class, not 63%
The problem would have been better stated if it had said 3/8 (37.5%) of the class were girls.
X students in class.
20 + 0.37x = x.
0.63x = 20,
X = 31.75.
Girls = 0.37 * 31.75 = 11.75.
The 0.75 is a SMALL girl. LOL.
To find the number of girls in the class, first, find what percentage of the class are boys.
Since 37% of the class are girls, the remaining percentage must be boys: 100% - 37% = 63%.
Given that there are 20 boys in the class, you can calculate the total number of students in the class.
Let x be the total number of students in the class.
So, 63% of x is equal to 20 boys.
63% of x = 20
(63/100) * x = 20
63x = 20 * 100
63x = 2000
x = 2000 / 63
x ≈ 31.75
Since the number of students should be a whole number, round x to the nearest whole number: x ≈ 32.
Now that you know the total number of students in the class is 32, you can find the number of girls.
37% of 32 = (37/100) * 32
= 0.37 * 32
≈ 11.84
Since the number of girls should also be a whole number, round 11.84 to the nearest whole number: ≈ 12.
Therefore, there are approximately 12 girls in the class.
To find the number of girls in the class, we first need to calculate the total number of students in the class. Since we know that 37% of the students are girls, we also need to figure out the percentage of boys.
Step 1: Calculate the percentage of boys in the class
Since 37% of the students are girls, the remaining percentage must be boys. We can calculate this by subtracting the percentage of girls from 100%:
100% - 37% = 63%
Step 2: Convert the percentage of boys into a decimal
To work with percentages in calculations, we usually convert them into decimals. We can divide the percentage by 100 to convert it:
63% ÷ 100 = 0.63
Step 3: Calculate the total number of students in the class
We can use the number of boys and the percentage of boys to find the total number of students. Let's say the total number of students is "T":
T * 0.63 = 20
Step 4: Solve for T
To find the total number of students, we divide both sides of the equation by 0.63:
T = 20 ÷ 0.63
T ≈ 31.75
Since we can't have a fraction of a student, we can round the total number of students to the nearest whole number. Therefore, the total number of students in the class is approximately 32.
Step 5: Calculate the number of girls
Now that we know the total number of students in the class (32), we can find the number of girls by multiplying it by the percentage of girls:
32 * 0.37 = 11.84
Again, since we can't have a fraction of a student, we round the number of girls to the nearest whole number. Therefore, the number of girls in the class is approximately 12.
So, the number of girls in the class is 12.