I'm struggling with variations! Scenario: You build a deck of cards from a collection. In the collection, there are 7x a cards and 8x b cards. What is the number of possible ways to choose 4 cards that are all a cards?

I'm struggling with variations! Scenario: You build a deck of cards from a collection. In the collection, there are 7x a cards and 8x b cards. What is the number of possible ways to choose 4 cards that are all a cards?

College Algebra

7th Edition

ISBN:9781305115545

Author:James Stewart, Lothar Redlin, Saleem Watson

Publisher:James Stewart, Lothar Redlin, Saleem Watson

Chapter9: Counting And Probability

Section9.1: Counting

Problem 92E: DISCUSS: Complementary Combinations Without performing any calculations, explain in words Why the...

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Scenario: You build a deck of cards from a collection. In the collection, there are 7x a cards and 8x b cards.

What is the number of possible ways to choose 4 cards that are all a cards?

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DISCUSS: Complementary Combinations Without performing any calculations, explain in words Why the number of ways of choosing two objects from ten objects is the same as the number of ways of choosing eight Objects from ten objects. In explain Why c(n,r)=c(n,nr)