Likelihood Outcomes
May will follow April
Certain
How many possible outcomes are there with a coin flip?
2 total possible outcomes
1/5
Toss a coin 100 times, how many Heads will come up?
We can expect 50/100
What are three strategies we can use to show all of the total possibilities?
Tree diagram, Area model, and organized list.
You will win a million dollars in the next 10 minutes.
What is the total possible outcomes rolling a 4-sided die and flipping a coin?
8 total possible outcomes
What is the probability of picking a red marble out of a bag of 10 red marbles?
10/10, 1
If 6 of your family members have cats and you have a total of 20 family members. Predict among 60 family members, how many would have a pet cat?
We can expect 18/60
How do I check that I have all the total possible outcomes?
Use the counting Principle
A horse will fly
Impossible
What is the probability you will choose a vowel from the alphabet?
5/26
What is the probability of picking a vowel from the word "Mathematics" ?
4/11
If Jim flips a coin 1200 times, what is the best prediction for the number of times that the coin will land heads up?
Close to 600 times
Possible outcomes of Event 1 x Possible outcomes of Event 2
Pulling a red card from a deck of cards
Equally likely
Suppose you roll a 6- sided die and flip a coin. What is the probability you will land on an even number and heads?
1/4
What is the probability that you will pick a red King from a deck of cards?
1/26
The results of a random survey of 8th grade students at Alton Public School showed that 15 out of 80 students like eating lunch at 11 am. If there are 480 grade 8 students, approximately how many students would be expected to prefer eating lunch at 11 am?
We can expect 90/480
Define Experimental Probability
Number of favourable outcomes/ total number of trials OR the probability being based on the number of trials we are experimenting.
There is an 90% chance of it snowing on the weekend
Highly likely
If there are 10 students in a class and 5 of them speak a second language, predict the probability that you will pick a student who speaks a second language among 50 students.
25/50