Step-by-step explanation:
2 parts + 5 parts + 3 parts equals 10 parts
£120 divided by 10 equals 12
this means each parte is worth £12
2 parts times £12 is £24
5 parts times £12 is £60
3 parts times £12 is £36
So ....
John gets £24
Jean gets £60
Jan gets £36
