Dice
What is the probability of rolling a 6 on a 15 sided die?
The probability is 1/15
What is the probability of a coin landing on heads?
The probability is 1/2
The probability it rains tomorrow is 0.3. What is the probability it doesn't rain?
0.7
What is the probability of picking a four in a deck of cards?
The probability is 4/52 or 1/13
Probability that is based on data collected from an experiment
Experimental Probability
What is the probability of not rolling a 3 or 4 on a fair dice?
The probability is 4/6 or 2/3
What is the probability of a coin landing on tails?
The probability is 1/2
At a carnival, there is a game where you shoot balls into a basket. The probability of getting the ball into the basket is 1/6.
If you shot 30 balls, how many would you expect to get in?
5
What is the probability of getting a spade from a deck of cards?
The probability is 13/52 or 1/4
Probability based on possible outcomes assuming equally likely events
Theoretical Probability
What is the probability of rolling a 1 or an even number on a 6 sided die?
The probability is 4/6 or 2/3
What is the probability of flipping two coins and landing on heads and then tails?
The probability is 1/4
In a game show, you choose one door to try to win a car. The host then opens one of the two remaining doors to reveal a goat. Should you keep your original door, or switch to the other hidden door to have a better chance of winning the car?
Switch
What is the probability of getting a heart or an ace of spades from a deck of cards?
The probability is 14/52 or 7/26
How do you calculate experimental probaility?
Number of times on event occurs/Total number of times the experiment was carried out
What is the probability of rolling a 2 and then a number higher than 4 when rolling two 6 sided dice?
The probability is 2/36 or 1/18
What is the probability of flipping three coins and each one landing on heads?
The probability is 1/8
The probability it snows on Monday in Canada is 0.02. The probability it snows on Tuesday is 0.5. What is the probability it snows both days?
0.01
What is the probability of drawing a nine, keeping it, then drawing another 9 from a deck of cards?
The probability is 12/2652 or 1/221
The sample space
What is the probability of rolling a 1 and then rolling a 2 or 3 and then rolling a number less than 3?
The probability is 1/54
What is the probability of flipping five coins and getting heads, then tails, then tails, then heads, and then tails?
The probability is 1/32
The probability of winning some lotteries is 1/14,000,000. What would be the probability of winning the lottery twice?
1 in 196,000,000,000,000
or
1 in one hundred and ninety six trillion
What is the probability of drawing an ace, returning it, then drawing a Spade Card from a deck of cards?
The probability is 52/2704 or 1/52