Basic Knowledge
What numbers is probability out of? (hint not talking about percents)
0 to 1
1/6
What is the fundamental counting principle?
The fundamental counting principle is where you determine the number of outcomes in a probability problem by multiplying the number of outcomes the object has by each item.
The word OR means what?
Add
The word AND means what?
Multiply
What is the likelihood of rolling an odd number on a number cube?
Equally Likely or unlikely.
What is the probability of flipping a coin and it landing on heads?
1/2
What is the number of outcomes if I spin a spinner with 4 sections and flip a coin?
4 times 2= 8 outcomes
Tossing a coin and spinning a spinner with 4 equal sides of colors. (spinner has the colors: red, green, blue, yellow)
Probability of tossing a head and spinning a green.
1/2 x 1/4= 1/8
Picking a marble out of a bag. There are 3 reds, 7 greens, 11 blue, 9 yellow). When you pick out a marble you do not replace.
Probability of picking a yellow and a red
9/30 x 3/29=
27/870
What scale would you rate the following:
Today there is a 68% chance of thunderstorms.
Likely
There is a class with 10 girls and 14 boys. What is the probability of choosing a boy. (Must be simplified)
14/24= 7/12
What is the number of outcomes for the following scenario. Anna is going school shopping. She wants a different outfit each day of the school year. If she buys 6 shirts, 5 jeans, 2 shoes, and 3 dresses, will she have enough for each day of the school year?
yes, she will have exactly 180 different outfits.
6x5x2x3= 30x2x3= 60x3=
180
Tossing a coin and spinning a spinner with 4 equal sides of colors. (spinner has the colors: red, green, blue, yellow)
Probability of tossing a tails and spinning a red or green.
1/2 x 2/4 = 2/8
1/4
Picking a marble out of a bag. There are 3 reds, 7 greens, 11 blue, 9 yellow). When you pick out a marble you do not replace.
Probability of picking a blue and a yellow
11/30 x 9/29=
99/870
Which of the following trials will help my relative frequency (experimental probability) be close to the theoretical probability.
A: 2 times
B: 100 times
C: 50 times
D: 101 times
D: 101 times
On a test you just took, you got 45 correct and 5 incorrect. What is the probability of the correct answers on your test? Simplify
45/50 = 9/10
Draw a tree diagram to determine the number of outcomes if you had to flip 3 coins.
Teacher will check white boards
Tossing a coin and spinning a spinner with 4 equal sides of colors. (spinner has the colors: red, green, blue, yellow)
Probability of tossing a tails and spinning a red, blue or green.
1/2 x 3/4=
3/8
Picking a marble out of a bag. There are 3 reds, 7 greens, 11 blue, 9 yellow). When you pick out a marble you do not replace.
Probability of picking two blues. Simplify to lowest term.
11/30 x 10/29=
110/870
11/87
What are the five rating scales for probability?
(Hint: think about the scale and starting at 0 -1)
Impossible, Unlikely, Equally likely or unlikely, Likely, Certain
You have 5 blue marbles, 6 green, and 3 red marbles. What is the probability of getting a red marble?
3/14
Draw a tree diagram for the following information:
Fast food restaurant
Sandwiches: chicken or beef
Sides: Mac n Cheese, Fries, Chips
Drink: Coke, Sprite, Water
Teacher will check white boards
Tossing a coin and spinning a spinner with 4 equal sides of colors. (spinner has the colors: red, green, blue, yellow)
Probability of tossing a head or spinning a green.
1/2+ 1/4 = 2/4+1/4
3/4
Picking a marble out of a bag. There are 3 reds, 7 greens, 11 blue, 9 yellow). When you pick out a marble you do not replace.
Probability of picking a red, yellow, and a blue
3/30 x 9/29 x 11/28=
297/24360