Vocabulary
An event that cannot happen.
What is Impossible?
All possible outcomes of rolling a 6-sided die.
What is {1,2,3,4,5,6}?
Rolling an odd number on a 6-sided die.
What is 1, 3, 5?
Probability of flipping heads on a coin.
What is 1/2?
Flipping a coin twice and getting heads both times.
What is (1/2)*(1/2) = 1/4?
An event that will definitely happen.
What is Certain?
All possible outcomes of flipping two coins.
What is {HH, HT, TH, TT}?
Rolling two dice and getting a sum of 7.
What are the 6 combinations: (1,6),(2,5),(3,4),(4,3),(5,2),(6,1)?
Probability of rolling a 3 on a die.
What is 1/6?
Rolling a 3 then a 5 on a die.
What is (1/6)*(1/6) = 1/36?
When two outcomes have the same chance of occurring.
What is Equally Likely?
All the possible outcomes for flipping THREE coins
What is {HHH, HHT, HTH, HTT, THH, THT, TTH, TTT}?
Drawing a red card from a standard deck.
What is 26/52 or 1/2?
Probability of an impossible event.
What is 0?
Drawing a card, replacing it, then drawing another card, both red.
What is (26/52)*(26/52)?
An event that probably won’t happen but still could.
What is Unlikely?
The set of outcomes for spinning a spinner with 4 equal sections: red, blue, green, yellow.
What is {red, blue, green, yellow}?
Drawing a face card from a standard deck.
What is 12/52 or 3/13?
Probability of a certain event.
What is 1?
Drawing two cards without replacement, both aces.
What is (4/52)*(3/51) = 1/221?
An event that probably will happen.
What is Likely?
The set of outcomes when rolling two dice and finding the sum.
What is {2,3,4,5,6,7,8,9,10,11,12}?
Drawing two cards without replacement, probability of both being red.
What is (26/52)*(25/51)?
Probability of rolling a 2 or 4 on a die.
What is 2/6 or 1/3?
An event where the probability of the second depends on the first.
What is a Dependent Event?