Still need some help......

:( A business has seven locations to choose from and wishes to rank only the top three locations. How many different ways can this be done?

and another one.....

An apartment building has the following apartments:
1 bedroom 2 bedroom 3 bedroom
1st floor 3 1 1
2nd floor 0 4 2
3rd floor 1 4 1
If an apartment is selected at random, what is the probability that it is not a 2 bedroom apartment on the 2nd floor?