The ratio of number of students studying Arts, Commerce and Science in a College is 7 : 5 :8. What is the new ratio of the number of students studying Arts, Commerce and Science respectively if there is an increase of 20%, 40% and 25% in the number of students studying Arts, Commerce and Science?
Choose the correct answer:
A) 18 : 35 : 50
B) 3 : 10 : 10
C) 4 : 8 : 5
D) 21 : 35 : 50
E) None of these
Suppose the number of students studying Arts, Commerce and Science be 7x, 5x and 8x respectively.   When their numbers are increased by 20%, 40% and 25% respectively the new ratio becomes   7x × 120% : 5x × 140% :   8x × 125% = 42 : 70 : 100   = 21 : 35 : 50   Answer 21 : 35 : 50
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The ratio of number of students studying Arts, Commerce and Science in a College is 7 : 5 :8. What is the new ratio of the number of students studying Arts, Commerce and Science respectively if there is an increase of 20%, 40% and 25% in the number of students studying Arts, Commerce and Science?