Theoretical
Experimental
Vocabulary
How Likely is it?
100

Maria is spinning a spinner. The spinner has 4 equal sections labeled A-D. What is the probability the spinner will land on the letter "A"?

1/4 or 0.25, or 25%

100

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%

100

An event that is impossible will have this percent probability.

What is 0%

100

How likely is it that a coin is flipped and lands on tails?

Equally likely

200

What is the probability of rolling an odd number with a standard number cube?

3/6, or 1/2, or 0.50, or 50%

200

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 letters "A & O"? 

A = 16,  E = 11,  I = 29,  O = 19,  U = 25

0.35 or 35/100 (7/20) or 35%

200
Define "theoretical probability."
It is the probability of what should occur.
200

How likely is it that a die is tossed and lands on 3?

Unlikely (1/6)

300

There are 15 girls and 13 boys in 6th period PE class. If coach Rosenthal randomly selects a member of 6th period, what is the probability that he will select a boy?

13/28, or 0.46, or 46%

300

The probability of drawing a club from a deck of cards.

What is 13/52? or 0.25 or 25%


300
Define "experimental probability."
The probability of what actually occurs.
300

How likely is it that a die is rolled and it lands on 8?

Impossible (0%)

400

There are 3 red marbles, 2 green marbles, and 1 yellow marble in a box. One marble is taken out and not replaced. A second marble is then taken out and not replaced. What is the probability both marbles that were taken out are red?

1/5, or 0.20, or 20%

400

Pedro recorded the types of birds that visit his bird feeder. Based on the results below, what is the probability the next bird will be a chickadee? 

Woodpecker = 3 Chickadee = 5 Cardinal = 1 Sparrow = 13 Blue Jay = 3

1/5, or 0.20, or 20%

400

Define "outcomes."

The results of an experiment

400

How likely is it that a die is tossed and lands on any number 1-6?

Certain

500

Jarvis spins a spinner with 5 equal sections numbered 1-5 and he spins another spinner with 5 equal sections with the letters A-E. What is the probability he will spin a 4 and a B?

1/25 or 0.04, or 4%

500

A six-sided die is thrown 50 times. Using the list below, how does the theoretical probability of rolling a 3 compare to the experimental probability of rolling a 3? 

How Many Times it Landed on that Number: 

1 = 8 times,  2 = 6 times,  3 = 7 times , 4 =12 times, 5 =10 times 6 = 7times

The theoretical probability is higher than the experimental probability. (Theoretical = 17%, Experimental = 14%)

500
Describe the difference between events that are certain, likely, equally likely, unlikely, or never going to happen.
Certain would be 100% of the time, likely is anything greater than 50% of the time, equally likely is exactly 50% of the time, unlikely is anything less than 50% of the time, and never is anything that has a 0% chance of occuring.
500

How likely is it that a die lands on 2 and a coin lands on heads?

This is COMPOUND PROBABILITY...

1/6 * 1/2 = 1/12 (unlikely)

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