Old profit sharing ratio of Naveen, Suresh and Tarun = 5:3:2
When Suresh retires, his share needs to be distributed between the remaining partners Naveen and Tarun.
Suresh's share = 103
This share is acquired by Naveen and Tarun in the ratio 2:1.
Naveen's gain = 32×103=102
Tarun's gain = 31×103=101
New share of Naveen = Old share + Gain from Suresh's share
= 105+102=107
New share of Tarun = Old share + Gain from Suresh's share
= 102+101=103
New profit sharing ratio = 107:103 = 7:3