Vocabulary
What singular word tells us to solve for independent probability?
Replace
What are the two formulas used for predictions?
%/100 = p/w
OR
p/w = p/w
Boseph can only go to one movie on either Tuesday or Thursday (to save money). He will be able to choose a kid or a comedy movie. Create a list that shows all possible options.
Comedy, Tuesday
Comedy, Thursday
Kid, Tuesday
Kid, Thursday
When working with dependent events, you must change the ______________ after finding the probability of the first event.
The probability of a spinner landing on purple is 1/4. What does 3/4 represent?
P(purple')
Complement of purple
What is the name of the vocabulary word that tree diagrams and lists represent?
Sample Space
Danny is going to randomly select a sock from his drawer. He has 3 solid, 5 striped. If Danny does this 32 times, what is a reasonable prediction for the number of times he will get a striped sock?
5/8 = x/32
5/8 = 20/32
x = 20
Two coins are flipped. What is the probability that both coins land on tails?
1/4
There are 3 candies in a bag. 1 is sour and 2 are chocolate. You draw a candy, do not replace it, and then draw another. What is the probability of choosing two sour candies?
Create a list or tree diagram that represents a coin being flipped while spinning a spinner numbered 1-3. Then circle the total amount of outcomes.
H1, H2, H3, T1, T2, T3
P(A') represents what vocabulary word?
Must spell correctly (:
Complement
The list below shows the different cupcakes sold by noon.
Vanilla: 4
Chocolate: 9
Lemon: 2
Based on the data, if 165 cupcakes were sold by the end of the day, how many cupcakes could be expected to be vanilla?
Total cupcakes: 4+9+2 = 15
4/15 = x/165
4/15 = 44/165
x = 44
Grubby has a set of 4 cards numbered 1, 2, 3, 4. Grubby will select a card and replace it. What is the probability that she selects a prime number and then a 1?
1/2 x 1/4 = 1/8
Sheldon has a set of five cards (8, 9, 3, 2, 1). Sheldon will randomly select a card, not replace it, and then select another card. What is the probability that he selects a composite number and then a 2?
2/5 x 1/4 = 2/20 = 1/10
The letters in the word PENDLEY are placed in a bag. What is the probability of selecting an E?
2/7
What key word tells us that we should set up a proportion when solving a word problem?
Expected or Prediction
In a game, the player wins if he rolls a 2 on a number cube. If the number cube is rolled 12 times, what is a reasonable prediction for the number of UNSUCCESSFUL rolls?
5/6 = x/12
5/6 = 10/12
x = 10
There are five marbles in a bag. Three are green and two are blue. You draw a marble, replace it, and draw another. What is the probability of choosing two blue marbles?
2/5 x2/5 = 4/25
A case of soda contains 4 Sprite, 5 Dr. Pepper, 2 Pepsi, and 9 Coca Cola. Lucy wants to choose two sodas at random. What is the probability that Lucy will select a Sprite and then a Pepsi?
4/20 = 1/5
2/19 x 1/5 = 2/95
Mr. Skittles has 10 coins that include dimes (3), pennies (5), and quarters (2). Create a sentence involving the phrase "quadruple as likely".
Mr. Skittles is quadruple as likely to select a penny or a dime as he would a quarter.
List all prime numbers under 30.
2, 3, 5, 7, 11, 13, 17, 19, 23, 29
At a pep rally, 4 out of the first 7 students were wearing spirit wear. Based on this information, if 210 students were at the assembly, then how many students could be expected to have on spirit wear?
4/7 = x/210
4/7=120/210
120 students
The letters of the alphabet are written on cards and placed in a brown paper bag. What is the probability of drawing a consonant, replacing it, and then drawing a vowel?
21/26 x 5/26 = 105/676
Smudge picked a toy from his toy box that had 40 different toys. Out of the toys, only two are jingle toys. He selected a jingle toy and then selected a jingle toy again. What is the probability that this could occur?
1/40 x 1/39 = 2/1560 = 1/780
What is the probability of randomly selecting an even number greater than 12 from the numbers 1-30. Represent your answer as a percent.
14, 16, 18, 20, 22, 24, 26, 28, 30
9/30 = 3/10 = 30%