Guarantee of Profit Questions

Vijay and Manohar share profits and losses in the ratio of $2:1$. They admit Prakash as a partner with $\frac{1}{4}$ share in profits with a guarantee that his share of profit will be at least Rs. $50,000$. The net profit of the firm for the year ending March 31, 2015, was Rs. $1,60,000$. Calculate the amount of profit Vijay will get.