Simple Probability
A cup has sticks numbered 1 through 13. What is the probability of an odd number?
7/13
In Kim’s homeroom, 4 students have no siblings, 9 students have 1 sibling, 8 students have 2 siblings, and 2 students have 3 or more siblings. What is the likelihood that a student chosen at random will have 2 or more siblings?
Unlikely
You roll a six-sided number cube 270 times. Predict how many times you will roll a number less than 3.
90 times
What is the probability of rolling a multiple of 3 on a standard number cube?
1/3
A spinner has 6 equal sections, red, blue, yellow, green, orange, and pink. What is the probability that the spinner will land on yellow?
1/6
The likelihood of rolling a number greater than 4 on a regular number cube.
Unlikely
The equal sections of a spinner have one of the following letters: A, B, A, C, B. Predict how many times the pointer will land on a consonant in 60 spins.
36 times
There are 4 aces and 4 kings in a standard deck of 52 cards. You pick one card at random. What is the probability of selecting an ace or a king?
2/13
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?
3/5
The likelihood of randomly choosing an even number 1 to 16.
As likely as not
A bag contains 6 red marbles, 2 white marbles, and 1 gray marble. You randomly pick out a marble, record its color, and put it back in the bag. You repeat this process 45 times. How many white or gray marbles do you expect to get?
15 marbles
There are 12 pieces of fruit in a bowl. Seven of the pieces are apples and two are peaches. What is the probability that a randomly selected piece of fruit will not be an apple or a peach?
1/4
A drawer contains 20 socks: 8 blue, 4 green, 6 black, and 2 white. What is the probability of picking out a blue sock?
2/5
The likelihood of pulling a green king from a standard deck of playing cards.
Impossible
Suppose a solitaire player has played 1,000 games. Predict how many times the player turned over a red card from the deck as the first card.
500 times
James counts the hair colors of the 22 people in his class, including himself. He finds that there are 4 people with blonde hair, 8 people with brown hair, and 10 people with black hair. What is the likelihood that a randomly chosen student in the class does not have red hair?
Certain
A class has 20 boys and 12 girls. What is the percent chance a girl will be randomly chosen to answer a question?
37.5 %
There's 2 red jacks in a standard deck. What is the likelihood of not getting a red jack?
Likely
What are the three steps (in order) to making a prediction?
Probability, Proportion, Prediction
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