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A math problem: Class A and Class B have 120 students, and the ratio of the two classes is 2: 3. How many students are there in Class A and Class B?
Solution: Class A accounts for 2/(2+3)=2/5 of the total number of Class A and Class B.
Class B accounts for 3/ (2+3) =3/5 of the total number of classes A and B..
Class A population: 120*(2/5)=48 (persons)
Class B population: 120-48=72.
Answer; There are 4872 students in Class A and Class B respectively.