In a classroom there were 60% of students who were preparing for IIT-J

1.	In a classroom there were 60% of students who were preparing for IIT-JEE exam and the number of students who were not preparing for IIT-JEE is 64. Then find the total number of student in the class.1. 1202. 1603. 2004. 180
Answer» Correct Answer - Option 2 : 160 Given: Percentage of students who were preparing for IIT-JEE = 60% Total number of students who were not preparing for IIT-JEE = 64 Calculations: Let the total number of student in the classroom be 100x Total number of students who were preparing for IIT-JEE = 100x × 60/100 = 60x Total number of students who were not preparing for II-JEE = 100x – 60x = 40x ⇒ 40x = 64 ⇒ x = 64/40 = 8/5 The total number of students = 100x = 100 × 8/5 = 160 ∴ The total number of students in the classroom is 160

In a classroom there were 60% of students who were preparing for IIT-JEE exam and the number of students who were not preparing for IIT-JEE is 64. Then find the total number of student in the class.1. 1202. 1603. 2004. 180

Answer» Correct Answer - Option 2 : 160

Given:

Percentage of students who were preparing for IIT-JEE = 60%

Total number of students who were not preparing for IIT-JEE = 64

Calculations:

Let the total number of student in the classroom be 100x

Total number of students who were preparing for IIT-JEE = 100x × 60/100 = 60x

Total number of students who were not preparing for II-JEE = 100x – 60x = 40x

⇒ 40x = 64

⇒ x = 64/40 = 8/5

The total number of students = 100x = 100 × 8/5 = 160

∴ The total number of students in the classroom is 160

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