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The ratio of boys and girls is 3:4. If there are 28 students in a class, how many are the boys?

The ratio of boys and girls is 3:4. If there are 28 students in a class, how many are the boys?

Explanation

The ratio of boys to girls is given as 3:4, and the total number of students in the class is 28.

Step 1: Add the parts of the ratio
Step 2: Calculate the value of one part

Each part of the ratio represents:

text{Value of one part} = frac{text{Total students}}{text{Sum of ratio parts}} = frac{28}{7} = 4
Step 3: Find the number of boys

The boys' share is 3 parts, so:

text{Number of boys} = 3 times 4 = 12