The ratio of number of boys and girls in a school is 1:2. If there are 90 students in the school, find the number of girls in the school?  Pick one
A) 45	B) 50	C) 60	D) 75	E) 90

Rationale: let the number of boys and girls be x and 2 x total students = 100 number of girls in the school = 2 * 90 / 3 = 60 answer is c
Answer: C