A invests Rs. 50,000 in a business. After a few months B joined him with Rs. 30,000. At the end of year, the total profit was divided between them in the ratio 3 : 1. After how many months did B join?
1
\(9\frac{1}{3}\)
2
\(8\frac{2}{5}\)
3
\(6\frac{2}{3}\)
4
\(5\frac{1}{3}\)
5
Question Not Attempted