A) 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?
If two letters are selected at random from the alphabet, use the counting principle to determine the number of possible outcomes if they are selected without replacement.
26 * 25 =
What is 650?
What is experimental probability?
What is the outcome when an experiment is completed.
A bag contains marbles; 3 red, 2 green, 5 yellow, 8 black, 4 purple. The probability of drawing a yellow marble and then a black marble.
5/22 * 8/21 =
What is 20/231
A kind of probability found by taking the number of ways the event can occur divided by the total number of equally likely outcomes.
What is the theoretical 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?
If two letters are selected at random from the alphabet, use the counting principle to determine the number of possible outcomes if they are selected with replacement.
26 * 26 =
What is 676?
Mia tosses a coin and gets heads 7 times out of 20. Is this theoretical or experimental?
What is experimental?
Flipping a coin and if it is tails rolling a die for 4 or greater.
1/2 * 1/2 =
What is 1/4
Outcomes that have the same probability
What is Equally Likely?
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?
Each day of the week is written on a separate piece of paper. The seven pieces of paper are then placed in a hat, and one piece is randomly selected. Determine the probability that the piece of paper selected contains a day that begins with “S” or a day with 6 letters in the name.
2/7 +3/7 - 1/7=
What is 4/7?
The probability of drawing a face card from a standard deck of cards is 3/13. Is this theoretical or experimental probability?
What is theoretical?
flipping a coin followed by flipping another coin.
1/2 * 1/2=
What is 1/4
A probability where the number of times an event occurs is divided by the total number of trials.
What is experimental probability?
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)
10. One card is selected from a deck of cards. Determine P ( A or B ).
A = a picture card B = a diamond
P(12/52) + P(13/52) - (3/52)
What is 11/26
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 Jack and then Patrick
1/30 * 1/30 = (with replacement!)
What is 1/900
grouping of objects or events in which the order does not matter
What is a combination?
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?
BP is considering a new shop, dog grooming. Mrs. Guenette found that the probability of 35 freshmen choosing this shop is 7%, the probability of 24 freshmen choosing this shop is 65%, and the probability of 11 freshmen choosing this shop is 28%. How many freshmen can Mrs. Guenette EXPECT to choose this shop?
35(.07) + 24 (.65) + 11(.28)= 21.13
What is approximately 21 students
A heart is randomly chosen from a deck of cards 7 out of 12 times. What is the theoretical probability?
What is 1/4?
5 unique bunnies in a bag. The probability that a black bunny will escape once the white and the spotted one have escaped.
1/5 * 1/4 * 1/3 =
What is 1/60