(a) Old ratio (Shiv, Mohan and Hari) = 5:5:4
Mohan's profit share = 5/14
His share is divided between Shiv and Hari equally i.e in the ratio of 1:1
Share of Mohan taken by Shiv = 5/14 X 1/2 = 5/28
Share of Mohan taken by Hari = 5/14 X 1/2 = 5/28
New profit share = Old profit share + Share taken from Mohan
Shiv's new share = 5/14 + 5/28 = 10/28 + 5/28 = 15/28
Hari;s new share = 4/14 + 5/28 = 8/28 + 5/28 = 13/28
New profit share (Shiv and Hari) = 15 : 13
(b) Old ratio (P, Q and R) = 5 : 4 : 1
P's profit share = 5/10
Since, no information is given on how Q and R are acquiring P's profit share after his retirement, therefore the new profit sharing ratio between Q and R is calculated just by crossing out P's share. That is, the new ratio becomes 4 : 1
New profit ratio (Q and R) = 4 : 1