In a class, 60% of the students are girls and there are 20 boys. What is the strength of the class?

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D
50

Let the strength of the class be $x$ .

Given that $60 %$ are girls, so $40 %$ are boys.
Now, $40 % \times x = 20$
(Since number of boys in the class is 20)
$\Rightarrow \frac{40}{100} \times x = 20$
$\Rightarrow x = \frac{20 \times 100}{40}$
$\Rightarrow x = 50$

Therefore, total number of students in the class is 50.

Suggest Corrections

Similar questions

Q. Class VII has a strength of 50 students out of which 40% are girls. Class VI has a strength of 40 and number of girls are 16. What is the difference in percentages of boys in both the classes?

In a class, 60% of the students are girls and there are 20 boys. What is the total number of students in the class?

There are 60 students in a class among which 30 are boys. In another class, there are 50 students among which 25 of them are boys. If one from each class is selected, What is the probability of both being girls?

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?

Solve the following.

There are 60 students in VII std. class. 30% of them are girls. Find the strength of boys.

Join BYJU'S Learning Program

In a class, 60% of the students are girls and there are 20 boys. What is the strength of the class?

The correct option is D 50 Let the strength of the class be x. Given that 60% are girls, so 40% are boys. Now, 40%×x=20 (Since number of boys in the class is 20) ⇒40100×x=20 ⇒x=20×10040 ⇒x=50 Therefore, total number of students in the class is 50.