Study the given graph and answer one questions that follows.
Degree wise distribution of no. of students working in Class (A, B, C, D and E)
Total no. of students = 3000
If 20% of students of class E are transferred to class A, then difference between no. of students in class A and 136% of the students in class D is?
Answer & explanation
Correct answer: option 1
Total no. of students = 3000
⇒ E = 93° = \(\frac{93°}{360}\) × 3000
⇒ 20% of E = \(\frac{93°}{360}\) × 3000 × \(\frac{1}{5}\) = 155
⇒ A = 64.2° = \(\frac{64.2°}{360}\) × 3000 = 535
⇒ Total student in class A = 535 + 155 = 690
⇒ D = 57° = \(\frac{57°}{360}\) × 3000
⇒ 136% of D = \(\frac{57°}{360}\) × 3000 × \(\frac{34}{25}\) = 646
⇒ Therefore,
Difference b/w students in class A (with 20% of E) and students in class D = 690 - 646 = 44