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Probability
Probability Part 2
Integers
Equations
Inequalities
100
Maria is flipping a coin.  What is the theoretical probability the coin will land on heads?
What is 1/2, 0.5, or 50%?
100
Define "theoretical probability"
The probability that you expect to happen
100

Write an integer to represent a loss of $150

-150

100

4x + 9 = 33

x = 6

100

Solving Inequalities

Solve for x.

2x > 8

What is:

x > 4

200
How likely is it that a number cube lands on 2 and a coin lands on heads?
unlikely
200

Jason rolled a die twenty times. He landed on 2 five times, 3 seven times,  6 two times, and 5 six times. What is the experimental probability of landing on 6?

1/10, 0.1, or 10%

200

-7 - 4 - (-6)

-5

200

2(x + 5) = 14

x = 2

200

Is the statement true

2x > -6

x = -3

False

300
What is the probability of rolling a number greater than 2 with a standard number cube?
What is 2/3, or 0.66, or 66%?
300
A letter tile is randomly selected from a bag, recorded, and replaced 100 times. The results are listed below. What is the experimental probability of selecting the letter "E"? A = 16 E = 11 I = 29 O = 19 U = 25
11/100 or 0.11, or 11%
300

-23 + 7

-16

300

3a + 12 - 6a = -9

a = 7

300

Solve the Equation:

f - 9 < -58

What is:

f < -49

400
Trent has 30 marbles in a bag. The theoretical probability of choosing a green or blue marble is 1/2. How many marbles are blue or green?
15 blue or green marbles
400
There are 20 students in Ms. Williams class. The theoretical probability of choosing a female student to answer a question is 40%. How many girls are in the class?
8 girls
400

-56 ÷ -7

8

400

7(4 - t) = -84

t = 16

400

Solve the inequalities. 2y+7>11

y>2

500
Jarvonya spins a spinner with 5 equal sections numbered 1-5. What is the probability she will spin and land on a composite number?
What is 1/5 or 0.2, or 20%?
500

Hasaan has a spinner with 5 equal sections, each a different color. After only 10 spins, the pointer had landed on red 40% of the time. After a whopping 1,000 spins, the pointer landed on red only 22% of the time. How can Hasaan account for this change in experimental probability?

As the number of trials increase, the experimental probability reaches closer to the theoretical probability. (The Law of Large Numbers)

500

-12 ÷ -6( 2)

4

500

WRITE AN EQUATION & SOLVE: Julie is 3 years older than her sister. Julie's age is 11 years old. How old is her sister?

n - Julie's sister's age n + 3 = 11 n = 8 Julie's sister is 8 years old.

500

Solving Inequalities

Solve for x. 

-9x + 1 > -71

What is: 

x < -8