Vocabulary
The list of all possible outcomes
What is the sample space?
A cup has sticks numbered 1 through 13. What is the probability of an odd number?
What is 7/13?
A coin and a die are both rolled. What is the probability of flipping tails and an even number?
What is (1/2 * 1/2 =) 1/4?
The weather app says there is a 20% chance of rain tomorrow.
What is unlikely?
Face cards are drawn 3 out of 13 times from a deck of cards.
What is theoretical probability?
A bag contains marbles; 3 red, 2 green, 5 yellow, 4 purple. The probability of drawing a yellow marble, putting it back, and then a green marble.
5/14 * 2/14 =
What is 5/98
(with replacement)
Probability determined from results of an experiment or number of trials.
What is experimental probability?
A spinner has 6 equal sections, red, blue, yellow, green, orange, and pink. What is the probability that the spinner will land on yellow?
What is 1/6?
A bag contains the following marbles: 4 red, 2 green, 3 yellow, and 1 orange. What is the probability that a green then a red will be picked, if the marble is replaced for the second draw.
What is (2/10 * 4/10 =) 8/100 or 2/25?
The likelihood of rolling a die and landing less than 7?
What is certain?
Mia tosses a coin and gets heads 7 times out of 20.
What is experimental probability?
Drawing an Ace from a deck of cards and then drawing a seven.
4/52 * 4/52 = 1/13*1/13
What is 1/169
Expected results
What is theoretical probability?
A spinner has 10 equal sections, 1,2,3,4,5,6,7,8,9, and 10. If the spinner is spun, what is the probability of spinning a number less than 7?
What is 6/10 or 3/5?
A drawer contains 4 white, 4 black, 2 yellow, and 5 polka-dot socks and Taylor wants to find a pair of yellow socks to wear to school. What is the probability that she will choose a pair of yellow socks in her first two picks if she doesn't replace the sock she draws first.
What is (2/15 * 1/14 =) 2/210 = 1/105?
Flipping a coin 20 times and landing on heads 17 times.
What is unlikely?
Determine the theoretical probability for flipping a coin three times and landing three heads.
What is one out of eight?
flipping a coin followed by flipping another coin.
1/2 * 1/2=
What is 1/4
Events for which the outcome of one event affects the probability of the other
What is dependent events?
A drawer contains 20 socks: 8 blue, 4 green, 6 black, and 2 white. What is the probability of picking out a blue sock?
What is 8/20 or 2/5?
A blue number cube and an orange number cube are rolled. What is the P(3, then even)?
What is (1/6 * 1/2 =) 1/12?
(the colors are extraneous information)
Rolling two dice and getting a sum of 14.
What is impossible?
A heart is randomly chosen from a deck of cards 7 out of 12 times. What is the experimental probability?
What is 7/12?
Selecting from 30 named sticks from a cup with replacement. Probability of selecting Lily and then Leo.
1/30 * 1/30 = (with replacement!)
What is 1/900
An outcome or set of outcomes of an experiment or situation.
What is an event?
Ms. Rippel and Ms. Roszkowicz's class has 20 boys and 12 girls. What is the percent chance that they will choose a girl to answer a question?
What is 12/32 = 37.5%?
A spinner with equal sections of red, blue, green, and purple is spun while a number cube is rolled. What is the P (not blue and not a 3)
What is (3/4 * 5/6 =) 15/24 or 5/8?
Getting snow in February.
What is likely?
Joshua is conducting an experiment and calculating the experimental probability of flipping a coin and landing on heads. Which amount of times should Joshua flip the coin so that his experimental probability is closest to the theoretical?
A) 2 B) 10 C) 30 D) 300
What is D - 300?
*Remember, you always want to do it the most times. The more times you conduct an experiment, the closer your probabilities will be to theoretical.
5 unique bunnies in a bag. The probability that a black bunny will escape once the white one has escaped.
1/5 * 1/4 =
What is 1/20
(without replacement)