Answer:
1. 6 fives.
2. 1 ten and 4 fives.
3. 2 tens and 2 fives.
4. 3 tens.
5. 1 twenty and 2 fives.
6. 1 twenty and 1 ten.
Explanation:
Given : A customer is owed $30.00.
To find : How many different combinations of bills,using only five, ten, and twenty dollars bills are possible to give his or her change?
Solution :
We have to split $30 in terms of only five, ten, and twenty dollars.
1) In terms of only five we required 6 fives as
So, 6 fives.
2) In terms of only ten and five,
a) We required 1 ten and 4 fives as
So, 1 ten and 4 fives.
b) We required 2 tens and 2 fives as
So, 2 tens and 2 fives
3) In terms of only tens we require 3 tens as
So, 3 tens.
4) In terms of only twenty and five, we required 1 twenty and 2 fives as
So, 1 twenty and 2 fives.
5) In terms of only twenty and ten, we required 1 twenty and 1 ten as
So, 1 twenty and 1 ten.
Therefore, There are 6 different combinations.