Question: there are 640 students in a school . the ratio of boys and girls in this school is 3 : 5 . find the total of girls & boys are there in this school ?
A) 320
B) 345
C) 375
D) 380
E) 400
Correct answer: E
Grade: 6 | Topic: Ratios and proportions | Difficulty: Medium | Standard: 6.RP.A.2