In a class, there are 30 boys and 60 girls. What is the ratio of boys to the total number of students in the class?

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Solution

The number of boys in the class is 30 and number of girls in the class is 60.

$∴$ Total number of students is equal to 30 + 60 = 90.

Ratio of number of boys to the total number of students is equal to $\frac{30}{90} = \frac{30 \div 30}{90 \div 30} = \frac{1}{3} = 1 : 3$

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In a class, there are 30 boys and 60 girls. What is the ratio of boys to the total number of students in the class?

The number of boys in the class is 30 and number of girls in the class is 60. ∴ Total number of students is equal to 30 + 60 = 90. Ratio of number of boys to the total number of students is equal to 3090=30÷3090÷30=13=1:3

The number of boys in the class is 30 and number of girls in the class is 60.

$∴$ Total number of students is equal to 30 + 60 = 90.

Ratio of number of boys to the total number of students is equal to $\frac{30}{90} = \frac{30 \div 30}{90 \div 30} = \frac{1}{3} = 1 : 3$