Vocabulary
What is the term for....
A specific outcome or a set of outcomes from a probability experiment.
Event
What is the probability of rolling a number less than 5?Reduce if possible
2/3
What is the probability of rolling an odd number less than 7?
Reduce if possible
1/3 or .33
What is the probability of rolling a number less than 9?
Reduce if possible
3/4 or .75
What is the theoretical probability for a coin toss?
50/50
What is the term for....
The probability of an event occurring based on known possible outcomes, without conducting an experiment.
Theoretical Probability
What is the probability of rolling an odd number less than 5?
Reduce if possible
1/3
What is the probability of rolling a number less than 6 OR a number greater than 9?
Reduce if possible
5/9 or .55
What is the probability of rolling a number less than 10 OR a number greater than 11?
Reduce if possible
5/6 or .83
You have a jar with 15 jellybeans.
5 red, 6 blue, 3 purple and 1 green.
What is the probability of randomly picking a purple jelly bean?
1/5 or 20%
What is the term for....
The measure of the likelihood that an event will occur, typically expressed as a number between 0 and 1.
Probability
What is the probability of rolling a 2 on the first die AND a 4 on the second die:
Reduce if possible
1/36
What is the probability of rolling an even number OR a number greater than 4?
Reduce if possible
7/9 or .778
What is the probability of rolling an odd # OR a number greater than 8?
Reduce if possible
2/3 or .667
You have a bag of M&Ms. In the bag there are 15 blue, 6 red, 4 orange, 8 green, 2 yellow and 7 brown.
What's the probability of picking a red M&M?
1/7 or 14.3%
What is the term for....
The principle that as the number of trials increases, the experimental probability of an event approaches its theoretical probability.
Law Of Large Numbers
What is the probability of rolling an even # OR a 6:
Reduce is possible.
1/2
What is the probability of rolling a 2 on the first die AND a number above 4 on the second die:
Reduce if possible
5/81 or .062
What is the probability of rolling a # above 12 OR a number below 3?
Reduce if possible.
1/6 or .167
You have a giant bag of M&Ms. In the bag there are 30 blue, 28 red, 40 orange, 18 green, 32 yellow and 32 brown.
What's the probability of picking a blue M&M?
1/6 or 16.7%
What is the term for....
The set of all possible outcomes in a probability experiment.
Sample Space
What is the probability of rolling a 1 on the first die, 6 on the second die AND an even # on the third die:
1/72
What is the probability of rolling a 8 on the first die, 15 on the second die AND an even # on the third die:
0/729 or 0
What is the probability of rolling a 3 on the first die, odd # on the second die, an even # on the third die and number above 3 on the fourth die?
Reduce if possible
1/64 or 0.015
In an experiment you flip a coin 630 times.
You get 380 heads and 250 tails.
What is the experimental probability of you getting heads?
Reduce if possible.
38/63 or 60.3%