In a college, the ratio of the number of boys to girls is 8 : 5. If there are 200 girls, the total number of
students in the college is  Choose one:
A) 420
B) 520
C) 620
D) 620
E) none of these

Rationale: explanation : let the boy are 8 x and girls are 5 x = > 5 x = 200 = > x = 40 total students = 8 x + 5 x = 13 x = 13 ( 40 ) = 520 answer : b
Answer: B