Vocabulary
the way that something turns out
What is probability?
A fair die is rolled. What is the probability of rolling a 5?
What is 1/6?
Two coins are flipped. What is the probability of getting both tails?
What is 1/2 * 1/2 = 1/4
Jack has two shirts and three pairs of pants to choose from, how many different outfits can he make?
What is 6 outfits.
What actually happens in a probability experiment?
What is experimental probability?
the way that something turns out.
What is the outcome?
A spinner has 6 equal sections, red, blue, yellow, green, orange, and pink. What is the probability that the spinner will land on a primary color?
What is 1/2?
A bag contains the following marbles: 4 red, 2 green, 3 yellow, and 1 orange. What is the probability that a green then a red will be picked, if the marble is replaced for the second draw.
What is 2/10 * 4/10 = 8/100 or 2/25
How many different pizzas can be made from choosing two types of crust, two different toppings, and eat in or take out?
What is 2*2*2 or 8 pizzas?
A boy tosses a coin and gets heads 7 times out of 20. Is this theoretical or experimental?
What is experimental?
what should happen in a probability experiment.
What is theoretical probability?
A spinner has 10 equal sections, 1,2,3,4,5,6,7,8,9, and 10. If the spinner is spun, what is the probability of spinning a number less than 7?
What is 6/10 or 3/5?
A card is picked and a coin is flipped. What is the probability that you draw a diamond and flip a head?
What is 1/4 * 1/2 = 1/8
You have eight different pairs of socks and five pairs of shoes. What is the sample space of your shoe-sock options?
What are 40 options?
The probability of rolling a multiple of three on a die is 1/3. Is this theoretical or experimental probability?
What is theoretical?
two or more simple events
What is a compound event?
A drawer contains 20 socks, 8 blue, 4 green, 6 black, and 2 white. What is the probability of picking out a blue sock?
What is 8/20 or 2/5?
A pair of dice are rolled. What is the P(3, then even)?
What is 1/6 * 1/2 = 1/12
How many outcomes are possible of choosing a month of the year and a day of the week?
What are 84 outcomes.
A card is chosen randomly from a deck of cards and is a face card. Is this theoretical or experimental probability?
What is experimental?
the use of multiplication to find the number of total possible outcomes.
What is the Fundamental Counting Principle?
A class has 20 boys and 12 girls. What is the percent chance that the teacher will choose a girl to answer a question?
What is 12/32 = 37.5%?
A spinner with equal sections of red, blue, green, and purple is spun while a number cube is rolled. What is the P (not blue and not a 3)
What is 3/4 * 5/6 = 15/24 or 5/8
How many outfits can be made from 3 sweaters, 4 blouses, 6 skirts, 2 pairs of socks, and 5 pairs of shoes?
What are 720 outfits?
Why would someone use a theoretical probability rather than just testing an event?
What is to make a prediction of what will happen?