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%
Julissa 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 22% of the time. How can Julissa 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)
Kristine is trying to decide what to wear to school. She knows she has a green pair of pants, a red pair, and a blue pair. She also has a brown shirt, a plaid shirt, and a yellow shirt. How many different outfit combinations can she make?
9
Define "theoretical probability."
It is what we "THINK" should occur.
How likely is it that Sanayah flips a a coin and it lands on tails?
Equally likely
The classic wood carousel at Carousel Park has 30 jumping horses and 20 standing horses. What is the probability of randomly selecting a jumping horse?
30/50 or 0.6 or 60%
Madison filpped a coin 100 times and got tails 70 times. What is her chance of tails on the next flip?
1/2 or 0.5 or 50%
What is the number of possible outcomes for spinning one spinner with 8 equal sections and then spinning another spinner with 6 equal sections?
48 possible outcomes
Define "experimental probability."
The probability of what actually occurs....when an experiment is done
How likely is it that a number cube is tossed and lands on 3?
Unlikely
What is the probability of rolling two odd numbers on two regular dice?
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%
Bella and Skye are candidates for class president of the 7th grade. Reko, Talon, and Daija are candidates for vice president. How many winning combinations are possible?
6
Describe the difference between events that are certain and impossible.
Certain would have a 100% chance of happening and impossible has a 0% chance.
How likely is it that a number cube is tossed and it lands on 8?
impossible
There are 3 red marbles, 2 green marbles, and 1 yellow marble in a box. One marble is taken out What is the probability you draw a yellow marble?
1/6 or 0.17 or 17%
Theresa recorded the types of birds that visit her 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%
Define "not likely"
When one event has a low chance of happening....below 50%
How likely is it that a number cube is tossed and lands on any number 1-6?
Certain
Mrs. Schroll spins a spinner with 5 equal sections numbered 1-5 and she spins another spinner with 5 equal sections with the letters A-E. What is the probability she will spin a 4 and a B?
1/25 or 0.04, or 4%
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?
Roll a 1=8 times Roll a 2=6 times
Roll a 3=7 times Roll a 4=12 times
Roll a 5=10 times Roll a 6=7 times
The theoretical probability is higher than the experimental probability. (Theoretical = 17%, Experimental = 14%)
What is the probability of rolling three 4's in a row on a number cube?
1/216
Define "equally likely."
When all the events have the same chance of happening.
How likely is it that a number cube lands on 2 and a coin lands on heads?
unlikely