Answer:
£30 
Explanation:
Given that,
Gavyn and Alex win some money and share it in the ratio of = 4 : 1.
Gavyn gets = £18
 How much will they get altogether
Now the ratio 4 : 1 
 The difference of the ratio 4-1 = 3 
 We then divide the money Gotten by Gavyn by the difference in the ratio
so,
18/3=6 
 6 x 1 is part =6 
 6 x 4 parts =24 
 24-6=18 
 24+6=30 
Therefore 
30/5=6 (1 part=6 4 parts = 24)
The money they got together is = £30