Theoretical
Maria is flipping a coin and spinning a spinner. The spinner has 4 equal sections labeled A-D. What is the probability the coin will land on heads and the spinner will land on the letter "A"?
1/8 or 0.125, or 12.5%
Johnny flipped a quarter 20 times, and recorded his results. He ended up with 16 heads and 4 tails. What is the experimental probability of Johnny flipping a heads the next time?
4/5, 0.8, or 80%
You are trying to decide what to wear to school. You know you have a green pair of pants, a red pair, and a blue pair. You also have a brown shirt, a plaid shirt, and a yellow shirt. How many different outfit combinations can you make?
9
Define "theoretical probability."
It is the probability of what should occur, or probability based on the number of possible outcomes.
How likely is it that a coin is flipped and lands on tails? **Use a phrase like "certain, unlikely, never, etc.**
Equally likely-there are only two options. It is a 50% chance of flipping each.
The classic wood carousel at Carousel Park in Hampton, VA has 32 jumping horses and 16 standing horses. What is the probability of randomly selecting a jumping horse?
2/3, or 0.67, or 67%
There are 16 children in Kenny's preschool class. During free time yesterday, 6 of them chose to play with stuffed animals. What is the experimental probability that a randomly selected preschooler would choose to play with stuffed animals today?
3/8, 0.375, or 37.5%
What is the number of possible outcomes for spinning one spinner with 8 equal sections and another spinner with 6 equal sections?
48 possible outcomes
Define "experimental probability."
The probability of what actually occurs, or the probability of an event based on results.
How likely is it that a number cube is tossed and lands on 3? **Use a phrase like certain, unlikely, never, etc.
Unlikely-there are 6 possibilities on a number cube, with only one of those possibilities being a "3"
What is the probability of rolling two odd numbers in a row with a standard number cube?
1/4, or 0.25, or 25%
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%
Amy and Shawn are candidates for class president of the 7th grade. AJ, Chishon, and Laura are candidates for vice president. How many winning combinations are possible?
6
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.
How likely is it that a number cube is tossed and it lands on 8? **Use a phrase like certain, unlikely, never, etc
never going to happen
There are 3 red marbles, 2 green marbles, and 1 yellow marble in a box. One marble is taken out and not replaces. 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%
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%
Ms. French is packing for a trip. She packs a white blouse, a pink blouse, a blue blouse, and a green blouse. She also packs a black suit, a navy blue suit, and a gray suit. What is the probability that the first outfit she wears is the gray suit with a pink blouse?
1 out of 12
Define "independent event."
When one event occurs and the item is replaced before the second event occurs, or a series of events where the previous event does not effect the next.
How likely is it that a number cube is tossed and lands on any number 1-6? **Use a phrase like certain, unlikely, never, etc
Certain
Maria owns the local bakery and decides to tally her sales each day for the most popular cupcakes. She sells 24 red velvet cupcakes and 12 strawberry. Out of the next 12 cupcakes sold, how many should Maria expect to be red velvet cupcakes?
8 red velvet cupcakes
What is the probability of rolling three 4's in a row on a number cube?
1/216
Define "dependent event."
When one event occurs and that item is not replaced before the second event occurs, or a series of events where the previous event does effect what happens next.
How likely is it that a number cube lands on 2 and a coin lands on heads?
unlikely