Practice Unordered Selection Of K Elements (11.6)

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8 questions

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Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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2 questions · about 1 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
How many ways can you choose 2 fruits from a basket of 4 different fruits?
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Use the formula C(n, k) = n! / (k!(n - k)!)
Question 2.
What is C(5, 0)?
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Think about picking no items at all.
3Question 3.
What is the formula for combinations?
- A) C(n
- k) = n! / (k!(n - k)!)
- B) P(n
- k) = n! / (k!(n - k)!)
- C) C(n
- k) = k! / (n!(n - k)!)
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Recall how we derive the number of ways to select.
4Question 4.
True or False: The order of selection matters in combinations.
- True
- False
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Think about how you list selections to compare.
Question 5.
Using a set of letters A, B, C, D, E, how many ways can you select 3 letters if repetitions are not allowed?
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Remember the formula for choosing without replacement!
Question 6.
In a flower shop with 6 types of flowers, how many distinct bouquets of 4 can be created allowing repetitions?
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Think how grouping flowers allows flexibility in counts.

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