Mathematics for IGCSE & O level - Ratio And Proportion (Section 3 - No. 3)
In a class of 34 students, the ratio of boys to girls is 3:4. How many boys are there?
12
14
16
18
คำอธิบาย
The total ratio parts are 3+4 = 7. Boys constitute 3/7 of the class. (3/7) * 34 = 12