Theoretical
Experimental
Predictions
Vocabulary
Compound Probability
100

Maria is flipping a coin.  What is the theoretical probability the coin will land on heads?

1/2, 0.5, or 50%?

100

Layla flipped a coin 10 times and landed on heads 4 times. What is the experimental probability of getting heads?

2/5, or 0.4, or 40%?

100

If you flip a coin 10 times, about how many times should it land on heads?

5
100
Define "probability."
The chance that an event will occur
100

What is the probability that a coin is flipped and lands on heads twice in a row?

1/4

200

The classic wood carousel at Carousel Park in Hampton, VA has 32 horses and 16 of them are standing horses. What is the probability of randomly selecting a standing horse?

1/2, or 0.50, or 50%?

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 getting 6?

1/10, 0.1, or 10%

200
You have a spinner with four equal sections that are blue, red, green, and yellow. If you spin it 100 times, about how many times should you land on yellow?
25 times
200
Define "experimental probability."
The probability of what actually occurs.
200

What is the probability that you get a one twice in a row when you roll a die?

1/36

300

What is the probability of rolling a number greater than 2 with a standard number cube?

2/3, or 0.66, or 66%?

300

A letter is randomly selected from a bag, recorded, and replaced 100 times. The results are below. What is the experimental probability of getting "E"? A = 16 E = 11 I = 29 O = 19 U = 25

11/100 or 0.11, or 11%

300
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
300
Define "theoretical probability"
The probability that you expect to happen
300

You have a spinner with four equal sections that are blue, red, green, and yellow. What is the probability you get a red and then a green?

1/16

400

There are 4 red marbles, 3 green marbles, and 1 yellow marble in a box. One marble is taken out of the box. What is the probability that the marble is red or yellow? 

5/8, 0.625 or 62.5%?

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

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

Describe the difference between events that are certain, likely, unlikely, or impossible.

Certain would be 100% of the time, likely is anything greater than 50% of the time, unlikely is anything less than 50% of the time, and impossible is anything that has a 0% chance of occuring.

400

You have a bag with 3 red marbles, 2 blue and 5 green. What is the probability you get a red marble, put it back and then get a green marble?

15/100 or 3/20

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?

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 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 gets closer to the theoretical probability.

500
Carley has a 0.2 chance of winning Ms. Williams raffle. If there are 30 tickets in the bucket, how many of the tickets have Carley's name on it?
6
500
What do you call the type of event where more than one event is occuring? (Ex: spinning two dice)
Compound event
500

You have a bag with 3 red marbles, 2 blue and 5 green. What is the probability that you get a red marble, keep it, and then get a green marble?

15/90 or 1/6

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