If you flip a coin 10 times, about how many times should it land on heads?
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?
What is 1/2, or 0.50, or 50%?
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%
How likely is it that a number cube is tossed and it lands on 8?
impossible
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?
What is 5/8, 0.625 or 62.5%?
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%
There are 20 students in Ms. Basile's class. The theoretical probability of choosing a student with brown hair to answer a question is 40%. How many brown-haired students are in the class?
8 girls
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.
How likely is it that you pull a red marble from a bag with 4 purple marbles, 12 red marbles, and 6 yellow marbles?
Likely
Luke spins a spinner with 5 equal sections numbered 1-5. What is the probability he will spin and land on a prime number?
What is 3/5 or 0.6, or 60%?
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 a whopping 1,000 spins, the pointer landed on red only 22% of the time. How can Hasaan account for this change in experimental probability? (Why is it not a shock that the probability changed so much?)
As the number of trials increase, the experimental probability reaches closer to the theoretical probability. (The Law of Large Numbers)
Samya has a 0.2 chance of winning Ms. Basile's raffle. If there are 30 tickets in the bucket, how many of the tickets have Samya's name on it?
6
What do you call the type of event where one event is occurring? (Ex: rolling a dice)
Simple event
How likely is it that a number cube is tossed and lands on any number 1-6?
certain