Evaluate
Find the number of permuations of 7 objects
Find the permuations of 12 objects taken 3 at a time
Find the combination of 10 objects taken 7 at a time
Find the number of salad varieties using one of four salad dressings and two of four additional vegetables.
How many different 4-card hands are possible if you draw 4 cards from a standard deck of 52 cards?
How many different 9-person batting-order lineups can made for a softball team with 16 players?
In how many ways can 3 blue, 2 red, and 5 green markers be distributed to 10 students?