There are 25 girls in a class. If the ratio of boys and girls in that class is 4:5, what is the total numer of students in that class?
45

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Solution

The correct option is A 45
Let the number of boys is $4 x$ and the number of girls is $5 x$ .

According to the question, $5 x = 25$

$\Rightarrow 5 x = 25 \Rightarrow x = \frac{25}{5} \Rightarrow x = 5$

Hence, the number of boys are, $4 x = 4 \times 5 = 20$

Therefore, total number of students in class is $20 + 25 = 45$

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There are 25 girls in a class. If the ratio of boys and girls in that class is 4:5, what is the total numer of students in that class?45

The correct option is A 45Let the number of boys is 4x and the number of girls is 5x. According to the question, 5x=25 ⇒5x=25 ⇒x=255 ⇒x=5 Hence, the number of boys are, 4x=4×5=20 Therefore, total number of students in class is 20+25=45

There are 25 girls in a class. If the ratio of boys and girls in that class is 4:5, what is the total numer of students in that class?
45