Vocabulary
A number from 0 to 1 that measures the likelihood that the event will occur.
Probability of an Event
How would you describe that chances of picking a red checker piece on a checkers set?
As likely as not
You toss a coin 12 times and it lands on heads 6 times. What was your experimental probability of getting a heads? (Written as a decimal)
0.5
What is the probability of picking a spade in a standard deck of cards? (as a fraction)
1/4
A plane travels 1650 miles in 3 hours. What is the unit rate?
550 miles/hour
A process with an uncertain result
Action
How would you describe the chances of rolling a 7 on a number cube?
Impossible
You pick 10 cards from a standard deck of cards and you end up getting 3 hearts, 1 diamond, 4 spades, and 2 clubs. What was your experimental probability of pulling a heart? (Written as a fraction)
3/10
If a spinner has 5 sections with the colors blue, green, orange, red and yellow. What is the probability of landing on the red section? (Written as a decimal)
0.20
Simplify: 2x - 5y + 4x + 3y
6x - 2y
The set of all possible outcomes
Sample Space
How would you describe the chances of it raining on a spring day?
Likely
Mr. Eddy read 20 books, 12 magazines, and 18 newspaper articles last year. Based on this data, what percentage of the material he read is a magazine?
24%
A number cube is rolled. What is the probability of not getting a a multiple of 3? (Written as a fraction)
4/6 or 2/3
Two angles are supplementary. One angle measures 4x and the other angle measures 52. What is the value of x?
32 degrees
A single outcome or group of outcomes from a sample space
Event
The probability of picking a blue marble out of a bag is 3/8. How would you describe this probability?
Unlikely
A store owner made a list of the number of greeting cards sold last month. The store sold the following:
167 thank you cards
285 birthday cards
56 blank cards
Based on the experiment, what is the probability that the next card bought is a blank card? (Round to the nearest whole percent)
11%
If a spinner has 5 sections with the colors blue, green, orange, red and yellow. What is the probability of landing on the red or the blue section? (Written as a percent)
40%
A store is offering a sale on TV's for 15% off. If the original price of the TV was $850, what is the sale price?
$722.50
The number of times the event occurs
total number of trials
Experimental Probability
How would you describe the chances of choosing a red or a black card from a standard deck of cards?
Certain
Blue: 6
Black: 3
Red: 2
Green: 7
Based on the experimental probability, how many of the next 36 balls should you expect to be green?
14
What is the probability of rolling a 2 and a 3 on a number cube? (Written as a percent)
0%
A square with a side length of 24 cm has a circle inscribed inside of it. What is the area of the circle? Use 3.14 for pi
452.16 sq cm