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In a class of 40 students, 25% are girls. How many boys are there in the class?

Practice Questions

Q1
In a class of 40 students, 25% are girls. How many boys are there in the class?
  1. 10
  2. 15
  3. 30
  4. 20

Questions & Step-by-Step Solutions

In a class of 40 students, 25% are girls. How many boys are there in the class?
  • Step 1: Find out how many girls are in the class by calculating 25% of 40 students.
  • Step 2: To calculate 25% of 40, multiply 40 by 0.25 (which is the decimal form of 25%).
  • Step 3: 40 multiplied by 0.25 equals 10. So, there are 10 girls in the class.
  • Step 4: To find the number of boys, subtract the number of girls from the total number of students.
  • Step 5: Subtract 10 (girls) from 40 (total students): 40 - 10 = 30.
  • Step 6: Therefore, there are 30 boys in the class.
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