Permutations
Combinations
Order _______________________!
Order _______________________!
Formula:
Formula:
Clue words:
Clue words:
Explain the difference between the permutation and
combination formula and why.
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1.
Permutations vs. Combinations
In each story, determine a) if the order does/does not matter and b) if it’s an example of a permutation/combination. c) Identify n and r. d) Compute the final answer.
Story A: Four freshmen are chosen from eighteen to be a Story B: Four freshmen are chosen from eighteen to be
the Class President, Vice President, Secretary, and
member of the leadership board.
Treasurer.
Order
Order
Order
Order
Combination
Combination
Doesn’t Permutation
Doesn’t Permutation
Matters
Matters
Matter
Matter
n = _____ ; r = _____
n = _____ ; r = _____
Story A: Choose five students in a class of twenty to sit in Story B: Choose five students in a class of twenty to form
a specific seat.
a group
Order
Order
Order
Order Doesn’t Permutation
Combination
Combination
Doesn’t Permutation
Matters
Matters
Matter
Matter
n = _____ ; r = _____
n = _____ ; r = _____
Story B: Choose six songs out of twenty to download.
Story A: Choose six songs out of twenty to make a
specific playlist for your party.
Order
Order
Order
Order
Doesn’t Permutation Combination
Doesn’t Permutation Combination
Matters
Matters
Matter
Matter
n = _____ ; r = _____
n = _____ ; r = _____
2.
3.
Story A: Three out of twelve students will make the
Story B: Three out of twelve students will be chosen as
the catcher, pitcher, and 3rd baseman
baseball team.
Order
Order
Order
Order
Doesn’t Permutation Combination
Doesn’t Permutation Combination
Matters
Matters
Matter
Matter
n = _____ ; r = _____
n = _____ ; r = _____
B: Three trumpet players out of six are chosen for
Story A: Three trumpet players out of six are chosen to Story
play.
1st chair, 2nd chair, and 3rd chair.
Order
Order
Order
Order
Doesn’t Permutation Combination
Doesn’t Permutation Combination
Matters
Matters
Matter
Matter
n = _____ ; r = _____
n = _____ ; r = _____
Story A: Five out of seven patients are called to remind
Story B: Five out of seven patients are called to schedule
a specific appointment time.
them of their appointment.
Order
Order
Order
Order
Doesn’t Permutation Combination
Doesn’t Permutation Combination
Matters
Matters
Matter
Matter
n = _____ ; r = _____
n = _____ ; r = _____
Homework: IXL probability practice (your choice), study for quiz, permutation
and combination practice problems 4.
5.
6.