P, Q and R were partners in a firm sharing profits and losses in the ratio of 3 : 4 : 1. On 31st March, 2022, R retired. R surrendered 1/3rd of his share in favour of P and the remaining share in favour of Q. Calculate the new profit sharing ratio of P and Q. 

Marks-2, CBSE:2021-22/Term-2/Zone-4/Set-1/Q-2