Describing Your Chances
What is 'Sample Space'?
The set of all possible outcomes
If there are 3 black and 3 white marbles in a bag, what is the chance of selecting a white marble?
3/6 = 1/2
What is the chance sample space of a die?
(1,2,3,4,5,6)
What is the Complementary Event of 'it will rain today'
It won't rain today
What is the probability of selecting a red card in a deck of 52 cards?
26/52 = 1/2 or 50%
What is 'Probability'?
The chance of an event happening
If there are 3 black and 4 white marbles in a bag, what is the chance of selecting a green marble?
Zero
What is the probability of rolling a 6 on a die?
1/6
What is the Complementary event of 'going up a ladder'
Going down a laddere
What is the probability of selecting a diamond from a deck of 52 cards?
13/52 = 1/4
What is the chance of a tossing a head (certain, unlikely, fifty-fifty, impossible)
Fifty-fifty
If there are 3 black and 4 green and 2 yellow marbles in a bag, what is the chance of selecting a green marble?
4/9
What is the probability of rolling a 2 or a 6 on a die?
1/3
If there is a 30% chance of a bike rider making a jump, what is the complementary event percentage of not making the jump?
70%
What is the probability of a selecting an ACE from a deck of cards?
4/52 = 1/13
What is the chance of dying?
Certain
If there are 3 black and 4 green and 2 yellow marbles in a bag, what is the chance of selecting a green or a yellow marble?
6/9
What is the probability of not rolling a 3 on a die?
5/6
An event has 0.33 chance of going ahead, what is the chance that it will not go ahead (as a decimal)
0.67
What is the probability of selecting a Jack or a Queen from a deck of cards?
8/52 = 2/13
Identify a 'likely' event
Coming to school each day
If there are 3 black and 4 green and 2 yellow and 7 blue marbles in a bag, what is the chance of NOT selecting a blue marble?
9/16
What is the probability of rolling a 3 or higher on a die?
4/6 = 2/3
What is the Complementary event of rolling a 1 or 2 or 3 or 5 or 6 on a die?
Rolling a 4
What is the probability of selecting either a red 9 or a black 4 or a King from a deck of cards?
8/52 = 2/13