पूर्णांक | CLASS 7 गणित | 7 PM Class by Amit Sir | L5 | Hindi Medium | Doubtnut

Acids,Bases and pH - Class 10 Science | 7 PM Master Class By Vipin Sir

The ratio of the number of students of three class is 2:3:5 .If 20 students are added in each class then the ratio becomes 4:5:7 .Find the number of student in each class before adding .

Class 11 के बाद क्या ? Class 12 Hindi Medium की पढ़ाई साल के शुरू से कैसे करें ?