Theoretical
Maria 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"?
1/4 or 0.25, or 25%
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 100 spins, how many times would she predict to get red?
40 times
Define "theoretical probability."
It is the probability of what should occur.
How likely is it that a coin is flipped and lands on tails?
Equally likely
Find P (heads, then heads)
1/4 or .25 or 25%
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?
1/2, or 0.50, or 50%
You randomly flip a coin 50 times. if you get heads 29 times, what is the P(tails)?
21/50 or .42 or 42%
Define "experimental probability."
The probability of what actually occurs.
How likely is it that a number cube is tossed and lands on 3?
Unlikely
For a six sided die...
Find P(even, then six)
1/12 or .083...or 8.3%
What is the probability of rolling a 4 with a standard number cube?
1/6, or 0.166666, or 16.67%
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%
Describe the difference between events that are certain, equally likely, or never going to happen. (HINT: Use % to explain the differences.)
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?
never going to happen
Find P (heads, then heads, then heads again)
1/8 or .125 or 12.5%
There are 3 red marbles, 2 green marbles, and 1 yellow marble in a box. One marble is taken out and not replaced What is the probability that the marble is green?
1/3, or .33333 or 33.34%
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%
How would you read the following in the context of rolling a die:
P(EVEN)
Probability of getting an even number when you roll the die.
How likely is it that a number cube is tossed and lands on any number 1-6?
Certain
For a six-side die...
Find P(odd, then at least 4)
1/4 or .25 or 25%
Jarvonya spins a spinner with 5 equal sections numbered 1-5. What is the probability that she lands on a multiple of 2?
2/5 or .40 or 40%
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? (FIND BOTH) Number on Die How Many Times it Landed on that Number 1- 8 times 2- 6 times 3- 7 times 4- 12 times 5- 10 times 6- 7 times.
The theoretical probability is higher than the experimental probability. (Theoretical = 16.67 or 17%, Experimental = 14%)
Probability is the study of....
chance events
How likely is it that a number cube lands on 2 and a coin lands on heads?
unlikely
For a six-sided die and a regular coin...
Find P(roll a 1, then get heads)
1/12