If 60% of a class of 50 students are girls, how many boys are there?

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Question: If 60% of a class of 50 students are girls, how many boys are there?

Options:

Correct Answer: 20

Solution:

Number of girls = 60% of 50 = 30. Number of boys = 50 - 30 = 20.

If 60% of a class of 50 students are girls, how many boys are there?

If 60% of a class of 50 students are girls, how many boys are there?

Step 1: Find out how many girls are in the class. To do this, calculate 60% of 50 students.
Step 2: To calculate 60% of 50, multiply 50 by 0.60 (which is the decimal form of 60%).
Step 3: 50 multiplied by 0.60 equals 30. So, there are 30 girls in the class.
Step 4: Now, to find out how many boys are in the class, subtract the number of girls from the total number of students.
Step 5: The total number of students is 50. So, subtract 30 (the number of girls) from 50.
Step 6: 50 minus 30 equals 20. Therefore, there are 20 boys in the class.

Percentage Calculation – Understanding how to calculate a percentage of a total number.
Basic Arithmetic – Performing simple subtraction to find the remaining quantity after calculating a part.