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A class constitutes of 35% of the girls. 10% of the girls chose sports as their activity, 80% girls chose art and craft while the rest of the 7 girls chose home science as their activity. How many boys are there in the class?

A class constitutes of 35% of the girls. 10% of the girls chose sports as their activity, 80% girls chose art and craft while the rest of the 7 girls chose home science as their activity. How many boys are there in the class? Correct Answer 130

According to the question,

Percentage of girls who chose home science = 100 - 10 - 80 = 10%

Let the number of girls present in the class be x

⇒ 10% of x = 7

⇒ x = 70

Thus, there are 70 girls present in the class.

Girls constitute 35% of the class. Let y be number of total students present in the class.

⇒ 35% of y = 70

⇒ y = 200

⇒ There are 200 students in the class.

∴ Number of boys in the class = 200 - 70 = 130 boys.

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