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