Simple Probability & Odds
You roll a number cube. What are the odds in favor of rolling an even number?
1:1
You choose 3 pizza toppings from a list of 12. Is this a permutation or a combination? How many ways can you choose 3 toppings?
Combination, 220
You toss a coin and roll a number cube. What is the probability that you flip heads and roll a 1?
1/12
Name the type of sampling method:
Every seventh name is called from a list of employees.
Systematic
Find the median of the data:
7, 5, 4, 6, 8, 3, 5, 2, 5
Median: 5
A spinner is equally divided into 8 sections. The sections are numbered 0 through 7. What is the probability of landing on an even number?
3/8
The school board has seven members, and the board mush have a chairperson, an assistant chairperson, and a secretary. How many different sets of these officers can be formed from the members of the board?
Permutation, 210
A card is chosen at random from a deck of 52 cards. The card is not replaced, and then a second card is chosen. What is the probability that you get a Jack, followed by an 8?
4/663
Name the type of sampling method:
People living in Maple Grove are divided into age brackets (18 - 17, 28 - 37, etc) and then 100 people are randomly selected from each age bracket to participate in a survey
Stratified Random Sample
What is the mean of the data:
92, 88, 84, 86, 88
Mean: 87.6
You have a 12-sided die, numbered 1 thorough 12. What is the probability of rolling a multiple of 4?
1/4
How many different ways can a gold, silver, and bronze medal be awarded among 15 competitors?
Permutation, 2730
A spinner with 10 sections labeled 1 - 10 is spun. What is the probability that you spin either an even number, or a number less than or equal to 3?
7/10
The principal asked the first 15 students who entered the school if they liked school. What is the population and sampling method?
Population: Students at the school
Sampling Method: Convenience Sample
What is the range of the data:
5, 7, 10, 8, 2, 1
Range: 9
The letters of the word AMERICA are placed in a bag. What is the probability of picking a consonant?
3/7
Your basketball team has 12 people on it. How many ways can the two captains be chosen?
Combination, 66
Miles randomly selects two pieces of fruit from a basket containing 8 oranges and 4 apples without replacing the first piece of fruit. What is the probability that he selects two oranges?
14/33
You want to determine what type of music is the favorite of students in your grade. You survey every tenth student from an alphabetized list of students. What is the population and sampling method?
Population: All students in your grade
Sampling Method: Systematic sampling
What is the mean, median, and mode of the data:
30, 42, 59, 66, 41, 35, 99
Mean: 53.1
Median: 42
Mode: No Mode
You roll two number cubes. What is the probability of rolling a sum of 7?
1/6
To open your locker, you must dial a sequence of three numbers on your lock. Given that there are 40 numbers on your lock and you can't repeat numbers, how many sequences of 3 numbers are possible?
Permutation, 59280
The names of 24 students, of which 14 are boys and 10 are girls, in Ms. White's science class are written on cards and placed in a jar. Ms. White randomly selects two cards (without replacement) to determine which two students will present their lab reports today. What is the probability that two girls are selected?
15/92
You create a questionnaire and distribute one to every student in the school. There is a box in the cafeteria where students can drop off completed questionnaires during lunch. What is the sampling method?
Self-Selected
What is the mean absolute deviation of the data:
30, 35, 20, 85, 60
21.2