Practice Combinations And Its Relation To Permutations (11.5)

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6 sample questions

Question 1.
What is the permutation of 4 objects taken 2 at a time?
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Use the formula P(n, r) = n! / (n - r)!
Question 2.
How many ways can you choose 3 out of 5 fruits?
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Use the formula C(n, r) = n! / (r!(n - r)!)
3Question 3.
What is the formula for finding permutations?
- P(n
- r) = n! / (n - r)!
- C(n
- r) = n! / (r!(n - r)!)
- Both are correct.
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Consider how order affects the arrangements.
4Question 4.
In combinations, does order matter?
- True
- False
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Think about selecting a group of items.
Question 5.
If a sports team has 12 players and 5 can be selected to form a different lineup, how many different lineups can be created? Consider both order and team selections.
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Focus on how to arrange those players, and remember order is important!
Question 6.
How many ways can 10 different books be chosen to have a 3-book series mixture, allowing some to be repeated in combinations?
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Remember to think of how the repetition changes the selection criteria!

4 more questions in this section. Enroll free to practise them all.