definitions
it is a collection of one or more outcomes
event
0% chance of snow today
impossible
if you have the following letter tiles A, D, U, P, O, S and F, how many outcomes do you have?
7
what is the probability of spinning an odd number on spinner 2?
0% not possible
How many times was the dice rolled?
50
probability based on repeated trials of an experiment
experimental probability
1/2 chance of rain today
equally likely or unlikely
if you have the following letter tiles A, D, U, P, O, S and F, how many favorable outcomes are there if you want to draw a vowel?
3
what is the probability of spinning a number less than 4 on spinner 1?
3/8 or 37.5%
what is the experiment probability of rolling a 2?
11/50 or 22%
an experiment that is designed to reproduce the conditions if a situation or process often using computer software
simulation
school will end at 3:30 P.M. today
Certain
if you have the following letter tiles A, D, U, P, O, S and F in a bag, what is the probability of drawing an A or S?
2/7 or 28.5%
5/8 or 62.5%
what is the experimental probability of rolling a 4?
9/50 or 18%
the possible results of an experiment
outcome
1/4 chance rain today
unlikely
what is the probability of flipping a heads on a coin and then rolling an 1 or 3 on a dice?
2/12 or 1/6 or 16.6%
what is the probability of spinning a multiple of 8 on spinner 2?
3/4 or 75%
what is the experimental probability of rolling a 1 and a six?
10/50 or 1/5 or 20%
the set of all possible outcomes of one or more events
sample space
75% chance of thunderstorms today
likely
what is the probability of rolling a 5, 7, 9 or 13 on a twenty sided dice and then flipping two heads?
4/80 or 1/20 or 5%
what is the probability of spinning an even number one the first spinner and then a multiple of 9 on the second spinner in spinner 3?
8/32 or 1/4 or 25%
what is the experimental probability or not rolling a 5?
36/50 or 18/25 or 72%