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Permutations Combinations

Order _______________________!

Order _______________________!

Formula: Formula:

Clue words: Clue words:

Explain the difference between the permutation and combination formula and why.

___________________________________________________________________

___________________________________________________________________

___________________________________________________________________

Permutations vs. Combinations

Ineachstory,determinea)iftheorderdoes/doesnotmatterandb)ifitsanexampleofapermutation/combination. c) Identify n and r. d) Compute the final answer.

1.

Story A: Four freshmen are chosen from eighteen to be a member of the leadership board.

Story B: Four freshmen are chosen from eighteen to be the Class President, Vice President, Secretary, and Treasurer.

Order

Matters

Order

Doesnt

Matter

Permutation Combination Order

Matters

Order

Doesnt

Matter

Permutation Combination

n = _____ ; r = _____ n = _____ ; r = _____

2.

Story A: Choose five students in a class of twenty to sit in a specific seat.

Story B: Choose five students in a class of twenty to form a group

Order

Matters

Order

Doesnt

Matter

Permutation Combination Order

Matters

Order

Doesnt

Matter

Permutation Combination

n = _____ ; r = _____ n = _____ ; r = _____

3.

Story A: Choose six songs out of twenty to make a specific playlist for your party.

Story B: Choose six songs out of twenty to download.

Order

Matters

Order

Doesnt

Matter

Permutation Combination Order

Matters

Order

Doesnt

Matter

Permutation Combination

n = _____ ; r = _____

n = _____ ; r = _____

4.

Story A: Three out of twelve students will make the baseball team.

Story B: Three out of twelve students will be chosen as the catcher, pitcher, and 3rd baseman

Order

Matters

Order

Doesnt

Matter

Permutation Combination Order

Matters

Order

Doesnt

Matter

Permutation Combination

n = _____ ; r = _____ n = _____ ; r = _____

5.

Story A: Three trumpet players out of six are chosen to play.

Story B: Three trumpet players out of six are chosen for 1st chair, 2nd chair, and 3rd chair.

Order

Matters

Order

Doesnt

Matter

Permutation Combination Order

Matters

Order

Doesnt

Matter

Permutation Combination

n = _____ ; r = _____ n = _____ ; r = _____

6.

Story A: Five out of seven patients are called to remind them of their appointment.

Story B: Five out of seven patients are called to schedule a specific appointment time.

Order

Matters

Order

Doesnt

Matter

Permutation Combination Order

Matters

Order

Doesnt

Matter

Permutation Combination

n = _____ ; r = _____ n = _____ ; r = _____

Homework: IXL probability practice (your choice), study for quiz, permutation and combination practice problems