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10-91.

Connie and Nora went into Ready Scoop to get ice cream cones, but Nora can’t make up her mind. They have flavors and she wants scoops. Homework Help ✎

  1. Nora is very particular about the order of the scoops. How many choices does she have if all of the scoops are different?

    No repeats, but order DOES matter.

  2. Nora changes her mind. She wants a dish (in which the order does not matter), not a cone, but she still wants three different flavors. How many ways can she order?

    No repeats, but order DOES NOT matter.

  3. Connie says, “I want a cone with dark chocolate on the bottom and then any other flavor(s) for the two scoops on top.” How many cones are possible with dark chocolate on the bottom?

    Repeats are acceptable: 

  4. Vlad came in as they were leaving and saw Connie’s cone. He said, “Oh, that’s what I want, a cone with chocolate on the bottom and then two other different flavors.” The clerk, said, “Okay, but we have four kinds of chocolate.” Vlad replied, “Any kind of chocolate will do.” How many different cones could fill Vlad’s order?

    Remember that Vlad has four choices of chocolate for the bottom and not just one.
    His next two choices will be different from the bottom and from each other.