**SOLUTION**

**Old Ratio (A, B and C) = 1/2 :2/5: 1/10 or 5: 4: 1**As we can see, no information is given as to how A and B are acquiring C’s profit share after his death, so the new profit-sharing ratio between A and B is calculated just by crossing out the C’s share. That is, the new ratio becomes 5: 4.

**∴ New Profit Ratio (A and B) = 5: 4**