Mr. X portfolio consist of two stocks. He has invested Rs.30,000 in stock 1 while Rs.60,000 in stock 2. Stock 1 and 2 has average returns of 17% and 19% respectively.

1. What is return of his portfolio
2. What will be the return of his portfolio is he replaces stock 1 with a new stock that has return of 20%.
3. What will be return of his portfolio if he adds a third stock that has Return of 15% and Mr.X has invests Rs. 70,000 in this stock, keeping investments in previous stocks as before.