Assuming the front row has been selected, how many ways are there to choose the 2 people

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Assuming the front row has been selected, how many ways are there to choose the 2 people in the middle row?

You and 5 of your friends are at an amusement park, and are about to ride a roller coaster. The cars have room for 6 people arranged in 3 rows of 2 , so you and your friends will perfectly fill one car.

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