Warm up

1
Warm up
Chicken Steak Seafood
lt 20 yrs old 28 9 13
gt 20 yrs old 15 14 21
Use the above table to answer the questions about
peoples favorite foods based on their age. 1. If
a person is chosen randomly, what is the
probability they like steak? 2. What is the
probability a person likes chicken given they are
less than 20 years old? 3. What is the
probability of picking a person that is less than
20 years old or that likes seafood?
23/100
14/25
71/100
2
GPS AlgebraDay 11
UNIT QUESTION How do you use probability to make
plans and predict for the future? Standard
MM1D1, MM1D2, MM1D3 Todays Question How do you
use probability to make plans and predict for the
future? Standard MM1D1-3
3
Review Today

• Test tomorrow!

4
A baseball coach is picking 9 players out of 16
to play different positions for a game. How many
possibilities are there?
1.
5
2. Mr. Shaw is making a committee of freshmen.
He is picking 3 people out of 200. How many
combinations are there?
6
3. There are 5 blue marbles, 3 red marbles, and 6
green marbles in a bag. What is the probability
of picking a blue marble and then a green marble
without replacement?
15/91
7
4. John has 6 cds in his disc changer. How many
different orders can the cds be played in?
720
8
5. There are 9 boys in a group and 10 girls in a
group. What is the probability of picking a boy
and then a girl to help you out (without
replacement)?
9
6. Given a deck of cards, what is the probability
of drawing 3 clubs in a row without replacement?
10
7. Find the expected value
E P(E)
10 .20
20 .30
30 .10
40 .40
27
11
8. Which set has the most variability (largest
IQR)?
Set 1 Set 2 Set 3 Set 4
Mean 45 50 50 60
Q1 30 20 30 50
Median 45 40 45 65
Q3 60 60 65 95
12
9. Find the mean absolute deviation of the
following data
12, 15, 17, 19, 24
3.28
13
10. Find the median, Q1, and Q3 for the following
data.
12, 15, 17, 20, 24, 26, 27
15, 20, 26
14
11. Find the probability of a sum of 300 if
spinning twice.
200
300
100
400
500
15
12. Find the probability of a 200 or a 300 on
one spin.
200
300
100
400
500
16
13. Find the probability that a randomly chosen
student likes pizza as their favorite food given
they are a male.
Pizza Chicken Other
Male 34 26 50
Female 20 32 48
17
14. Find the probability that a randomly selected
student does not like pizza or chicken?
Pizza Chicken Other
Male 34 26 50
Female 20 32 48
18
15. Find the number of ways to arrange 2 of the
letters in the name
Thomas
19
REVIEW

• In the cafeteria, you have a choice of 3 sides, 5
  main dishes, and 4 drinks. How many
  possibilities for meals are there?

60
20
REVIEW

• A teacher is picking a hall monitor and a helper
  for the day from her class of 22. How many
  possibilities are there in picking these 2 people?

462
21
REVIEW

• You are picking 4 of your 12 friends to come over
  to play basketball with you. How many
  possibilities are there for picking the 4 people?

495
22
REVIEW

• You have 5 red marbles, 3 blue marbles, 6 green
  marbles, and 4 yellow marbles in a bag. What is
  the probability of picking a red marble and then,
  another red marble if the first is not replaced?

10/153
23
REVIEW

• You have 5 red marbles, 3 blue marbles, 6 green
  marbles, and 4 yellow marbles in a bag. What is
  the probability of picking a blue marble and then
  a green marble if the first is replaced?

1/18
24
REVIEW

• A field goal kicker has a 70 chance of making
  the field goal (3 points), and a 30 chance of
  missing it. What is the expected value of this
  situation?

2.1
25
REVIEW

• A spinner has 4 equal sections red, blue, green,
  and yellow. What is the probability of landing
  on red 2 times in a row?

1/16
26
REVIEW

• A machine is making parts. An inspector finds
  that 4 out of every 100 are bad. What is the
  probability of picking two bad parts in a row if
  the first one is not replaced?

1/825
27
REVIEW

• Rolling 2 Dice What is the probability of
  rolling doubles or a sum of 3?

2/9
28
REVIEW

• Rolling 2 Dice What is the probability of
  rolling doubles or a sum of 8?

5/18
29
REVIEW

• Find the Mean Absolute Deviation of the following
  data.
• 12, 14, 17, 18, 19

2.4
30
REVIEW

• Find the Interquartile Range of the following
  data.
• 4, 6, 11, 15, 21, 24

15
31
REVIEW

• What is the probability that a randomly chosen
  person likes the food?

9th grade 10th grade
Likes current food 28 36
Does not like current food 44 42

32/75
32
REVIEW

• What is the probability that a randomly chosen
  person likes the food given they are in the 10th
  grade?

9th grade 10th grade
Likes current food 28 36
Does not like current food 44 42

6/13
33

• On one Side write your name

• On the other rank your group members (include
  yourself) on how much they participated

34
HW

• Worksheet
• and
• STUDY FOR THE TEST!