Practice:

1) When building a house, Bob can choose from four different lots, three different house styles, and five different floor plans.  How many different possibilities are there for building a house?  Answer

2) Alan and Mike have ten major league baseball ballparks they would like to visit over the next few years. If they have not visited any of the parks previously and would like to visit four parks this summer, in how many ways can they organize their trip   Answer

3) In the state track meet, eight sprinters will run the 100-yard dash. How many ways can gold, silver, and bronze medals be awarded?  Answer

4) How many five-digit zip codes can be made where all digits are unique if the possible digits are 0 through 9?   Answer

5) How many five-digit zip codes can be made where all digits are unique if the possible digits are 0 through 9 and if the first digit cannot be a 0?   Answer