3. Fred rolls a bowling ball and knocks down four of ten pins. Theoretically, how many ways can four groups of pins be knocked down? How many ways can pins one through four be knocked down?

In how many ways can 10 teenagers be seated at a round table if 2 girls wish to sit with their boyfriends.

A family consisting of 2 parents and 3 children is to pose for a picture with 2 family members in the front and 3 in the back a. How many arrangements are possible with no restrictions? b. How many arrangements are possible if the parents must sit in the front? C. How many arrangements are possible if the parents must be next to each other?