Theoretical
Maria is flipping a coin. What is the theoretical probability the coin will land on heads?
1/2
Layla flipped a coin 10 times and landed on heads 4 times. What is the experimental probability of landing on heads?
2/5
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 "probability."
The chance that an event will occur
How likely is it that a coin is flipped and lands on tails?
Equally likely
What is the probability of rolling a number greater than 2 with a standard number cube?
2/3
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 landing on 6?
1/10
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
Define "experimental probability."
what actually happened
How likely is it that a number cube is tossed and lands on 3?
Unlikely
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
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%
Trent has 30 marbles in a bag. The theoretical probability of choosing a green or blue marble is 0.4. How many marbles are blue or green?
12 blue or green marbles
Define "theoretical probability"
what should happen
How likely is it that a number cube is tossed and it lands on 8?
impossible
In a bag there are 6 blue marbles, 4 red marbles, 8 yellow marbles, and 2 orange marbles. What is the probability of selecting a red marble, not replacing it, then selecting a yellow marble?
8/95
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
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
What is the fundamental counting principle?
multiply the number of possible outcomes for each event
How likely is it that a number cube is tossed and lands on any number 1-6?
Certain
Mike is trying to guess the combination for his friend's locker. The combination has 3 numbers and each number could be from 0 to 39. What is the probability that Mike will guess correctly in one attempt?
1/64000
A six-sided die is thrown 50 times. Using only the results below, what is the probability of rolling a 3 and then a 4? 1 -8 times 2- 6 times
3- 7 times 4-12 times
5- 10 times 6- 7 times
21/625
What is the probability of rolling three 4's in a row on a number cube?
1/216
What do you call the type of event where more than one event is occuring? (Ex: spinning two dice)
Compound event
How likely is it that a number cube lands on 2 and a coin lands on heads?
unlikely