Probability
A number cube is rolled. What is the probability of landing on a 2?
1/6
The probability and complement should also have a sum of _________. (What number? NOT percent)
1
A bag contains: 3 yellow blocks, 7 blue blocks, 5 green blocks, 6 pink blocks, and 4 red blocks.
A block will be drawn from the bag and replaced 150 times. What is a reasonable prediction for the number of times a red block will be drawn?
24
Draw a greater than sign.
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Probability should also be written as a ______________ and Predictions should always be written as a _____________.
Fraction & Number
A number cube is rolled. What is the chance of getting a number 4 or less?
2/3
The spinner shown is divided into congruent sections that are labeled from 1 through 7.
Fill in the blanks:
The probability of landing on a 5 is ______ and the probability of NOT landing on a 5 is _______.
1/7 & 6/7
A bag contains: 3 yellow blocks, 7 blue blocks, 5 green blocks, 6 pink blocks, and 4 red blocks.
A block will be drawn from the bag and replaced 150 times. What is a reasonable prediction for the number of times a red or pink block will be drawn?
60
On a number cube, the chance of rolling an even number is _________ the chance of rolling an odd number.
equal or =
To solve a prediction, you will need to use a ____________________.
Proportion
A box has the following candies:
3 KitKats, 2 M&Ms, 4 Hersheys, and 1 Reese.
What is the probability of randomly selecting a KitKat or Reese?
2/5
There were 3 ice cream flavors at a shop:
Vanilla sold 10, Chocolate sold 12, and Strawberry sold 8 in one day. What is the probability that the next customer would NOT pick Vanilla?
Fill-in the blanks below to make this statement true.
____, because the probability of choosing Vanilla is __________.
2/3, because 1/3 is Vanilla
On a field trip, 3 out of every 7 students brought a lunch. Based on this information, if 350 students attended the field trip, how many could be expected to bring a lunch?
150
A survey about how students got home each day:
52 Car rider, 26 Bus, 20 rode a bike, and 30 walked
The student is more than twice as likely to take a Car ride home as to (bus, bike, or walked).
bike
For compound probability we must make 2 fractions and then ___________.
multiple
A box has the following candies:
3 KitKats, 2 M&Ms, 4 Hersheys, and 1 Reese.
What is the probability of randomly selecting M&Ms first, putting it back, and then selecting a Reese?
1/50
The spinner shown is divided into congruent sections that are labeled from 1 through 9.
Fill in the blanks:
The probability of landing on an even number is ______ and the probability of NOT landing on an even number is 5 is _______.
4/9 & 5/9
If a number cube is rolled 30 times what is a reasonable prediction for how many times it will land on a 2 or 3?
10
A survey about how students got home each day:
52 Car rider, 26 Bus, 20 rode a bike, and 30 walked
Fill-in the blanks:
Bus rider is _______ as likely as car riders
Bus riders are _______ more than bike riders.
1/2 or half
6
With compound probability.....
If an item is replaced, then it is an INDEPENDENT event and totals SHOULD change.
True or False
FALSE
There are 10 comedy movies, 10 horror movies, 10 Sci-Fi movies, and 10 action movies at a store. What is the probability of randomly selecting a Sci-Fi movie, putting it back and then selecting a movie that is action?
1/16
68 out of 80 students did NOT pass the Unit 3 Test. How many students needed to retest for Unit 3?
12
At the zoo there are 20 penguins and 14 otters. a random child chooses an animal at random to meet and then leaves. This process is repeated 17 times. What is a reasonable prediction for the number of times that an otter is chosen?
7
Students favorite sports are listed from a survey:
Football 24, Basketball 20, Tennis 5, Baseball 16
The number of students who chose Football will be 1&1/2 times the number of students who chose Baseball. (TRUE or FALSE)
True
If a coin is tossed twice...
Then how many total combinations can be made?
4