Question: In a class of 30 students, if 12 are girls and the rest are boys, how many boys are there?
Options:
18
12
15
20
Correct Answer: 18
Solution:
If there are 30 students and 12 are girls, then the number of boys is 30 - 12 = 18.
In a class of 30 students, if 12 are girls and the rest are boys, how many boys
Practice Questions
Q1
In a class of 30 students, if 12 are girls and the rest are boys, how many boys are there?
18
12
15
20
Questions & Step-by-Step Solutions
In a class of 30 students, if 12 are girls and the rest are boys, how many boys are there?
Step 1: Identify the total number of students in the class, which is 30.
Step 2: Identify the number of girls in the class, which is 12.
Step 3: To find the number of boys, subtract the number of girls from the total number of students: 30 - 12.
Step 4: Calculate the result: 30 - 12 = 18.
Step 5: Conclude that there are 18 boys in the class.
Basic Arithmetic – The question tests the ability to perform simple subtraction to find the number of boys in the class.
Understanding of Total and Subset – The question assesses the understanding of how to differentiate between total students and a subset (girls) to find the remaining subset (boys).
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