## > `Total 12 different ways.`

`Total 12 different ways.`

- include two 20p coin - remaining are 10p can be completed by 2 ways ( include one or zero 10p coin ) -->> 2 methods
- include one 20p coin - remaining are 30p can be completed by 4 ways ( include three or two or one or zero 10p coin ) -->> 4 methods
- include zero 20p coin - remaining are 50p can be completed by 6 ways ( include 5/4/3/2/1/0 - 10p coin ) -->> 6 methods

Total 2+4+6 = 12 methods.