Answer:
£130
Explanation:
With 'sharing' ratios problems like this, find the total amount of parts of the ratio :
1 : 3 = 1 + 3 = 4
Now divide the total amount of parts by the total amount of money shared :
£520 ÷ 4 = 130
Now multiply 130 by the appropriate value, in this case, Alex's value, which is 1
£130 x 1 = £130
hope this helps :)