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Permutation or Combination? 10 candidates are chosen...

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9.19.3 Review Problems.notebook 1 March 13, 2018 Mar 134:48 AM Hello, my awesome precalc students. I regret that I am unable to be there with you today. Study hard, and I will see you tomorrow for Pi Day! Email me if you have any questions. Mar 1012:31 PM Permutation or Combination? 10 candidates are chosen C
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9.1­9.3 Review Problems.notebook

1

March 13, 2018

Mar 13­4:48 AM

Hello, my awesome precalc students.  I regret that I am unable to be there with you today.  Study hard, and I will see you tomorrow for Pi Day! Email me if you have any questions.

Mar 10­12:31 PM

Permutation or Combination?

10 candidates are chosen

C

9.1­9.3 Review Problems.notebook

2

March 13, 2018

Mar 10­12:32 PM

Five runners finish a race.

P

Mar 10­12:27 PM

How many 4­digit numbers are possible?Numbers like 0001 count as 4­digit.

10,000

9.1­9.3 Review Problems.notebook

3

March 13, 2018

Mar 10­12:29 PM

How many outfits are possible if you have 4 pairs of skinny jeans, 2 hoodiesand 3 pairs of shoes?

24

Mar 10­12:32 PM

How many committees of 5 peoplecan be selected from 6 men and 7 women if the committee must have 2 men and 3 women?

6C2*7C3 = 525

9.1­9.3 Review Problems.notebook

4

March 13, 2018

Mar 10­12:34 PM

How many ways can 4 girls line up?

4! = 24

Mar 10­12:35 PM

How many ways can first and second chair flute be chosen from 10 flutists?

10P2 = 90

9.1­9.3 Review Problems.notebook

5

March 13, 2018

Mar 10­12:36 PM

How many different 3 number locker combinations are possible on a lockthat has 30 numbers on its dial?

30P3 = 24,360

Mar 10­12:37 PM

Rolling Dice:

P(sum is 4 or 5)

7/36

9.1­9.3 Review Problems.notebook

6

March 13, 2018

Mar 10­12:38 PM

P(sum is 11)

1/18

Mar 10­12:38 PM

P(prime sum)

15/36 = 5/12

9.1­9.3 Review Problems.notebook

7

March 13, 2018

Mar 10­12:40 PM

You are rolling a die and tossing a coin.  What is the probability of getting an even number and a head?

1/2*1/2 = 1/4

Mar 10­12:41 PM

A 4­card hand is dealt from 52 cards.What is the probability that 2 are queens?

[(4C2)(48C2)]/(52C4) = .025

9.1­9.3 Review Problems.notebook

8

March 13, 2018

Mar 10­12:43 PM

A 4­card hand is dealt from 52 cards.What is the probability that none are queens?

(48C4)/(52C4) = .719

Mar 10­12:44 PM

A 4­card hand is dealt from 52 cards.What is the probability that 1 is a queen and 3 are aces?

[(4C1)(4C3)]/(52C4) = .0000591

9.1­9.3 Review Problems.notebook

9

March 13, 2018

Mar 10­12:46 PM

10 nickels are tossed dated 2000­2009.Find the probability that there is a tail on the 2000 and 2009 nickels only.

1/1024

Mar 10­12:47 PM

10 nickels are tossed dated 2000­2009.Find the probability that there is exactly 3 tails.

(10C3)(.5)3(.5)7 = 15/128

9.1­9.3 Review Problems.notebook

10

March 13, 2018

Mar 10­12:49 PM

Find the coefficient on the a2b term of (a + b)3.

3

Mar 10­12:50 PM

Find the coefficient on the a2 term of (a ­ 3)7.

­5103


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