DinaDina​'s collection of eighteight albums includes one bluesblues album. DinaDina will choose fivefive of her albums to play on a road trip.​ (Assume order is not​ important.) ​a) How many different sets of fivefive albums could she​ choose? ​b) How many of these sets would not include the bluesblues ​album? ​c) How many of them would include the bluesblues ​album?

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