Question: In the example we used to introduce combinations, you were choosing four of five friends to ride with you in your car. By computing 5C4

In the example we used to introduce combinations, you were choosing four of five friends to ride with you in your car. By computing 5C4 we discovered that there are fve distinct combinations of four friends that you might select. Now consider a slight variation: In how many different ways could you select one of your five friends to exclude from the car? Compare your answer to the 5C4 result and comment on the connection.

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