Xuan spent $36 at a mart. She took out some ten-dollar notes and five-dollar notes from her purse to pay for the items at the cashier. She received $4 change from the cashier.
- How much money did Xuan take out from her purse?
- How many possible number of ten-dollar notes and five-dollar notes did she take out from her purse?
(a)
Amount that Xuan took out from her purse
= 36 + 4
= $40
(b)
Possible number of ten-dollar notes and five-dollar notes :
10, 10, 10, 5, 5
10, 10, 5, 5, 5, 5
10, 5, 5, 5, 5, 5, 5
10, 5, 5, 5, 5, 5, 5
Number of possible number of ten-dollar notes and five-dollar notes: 4
Answer(s): (a) $40; (b) 4