In a college, the ratio of the number of boys to girls is 6 : 5. If there are 200 girls, the total number of students in the college is Choose one:
A) 440
B) 520
C) 620
D) 720
E) 820

Rationale: "explanation : let the boy are 6 x and girls are 5 x = > 5 x = 200 = > x = 40 total students = 6 x + 5 x = 11 x = 11 ( 40 ) = 440 option a"
Answer: A