Probability Basics
Probability can be expressed as a fraction between the numbers ______ and ______.
0 and 1
What is the probability of you rolling a dice and landing on a 2?
1/6
What is the probability of you rolling two dice and landing on a 2 and an even number?
1/12
You plan to roll a dice 200 times. About how many times should you expect the dice to land on an even number?
100
There is a 30% chance of rain tomorrow. Describe this event using one of the following words:
certain, likely, equally likely, unlikely, impossible
unlikely
What is the probability of you rolling a dice and landing on a 5 or 6?
1/3
You roll a dice and flip a coin. What is the probability of you rolling a number less than 5 and flipping a heads.
1/3
1 out of every 5 chips in the bag will be broken when you buy it. If there are 80 chips in the bag, how many would you expect to be broken?
16
You roll a dice and flip a coin. List the sample space of this event.
1H, 2H, 3H, 4H, 5H, 6H, 1T, 2T, 3T, 4T, 5T, 6T
You have a bag with 10 blue marbles, 3 green marbles, 2 red marbles, and 5 yellow marbles. What is the probability that you will randomly select a green marble?
3/20
You have a bag with 10 blue marbles, 3 green marbles, 2 red marbles, and 5 yellow marbles. What is the probability that you will randomly select a green marble, put it back, then randomly select a blue marble?
3/40
You spin an 8 section spinner 120 times. If the sections are all equal sizes, labeled 1-8, how many times would you expect the spinner to land on a 7?
15
At Braum's, they have 25 different flavors of ice cream. Out of the last 10 customers who have walked in, 7 have ordered Chocolate Chip Cookie Dough. What is the experimental probability that someone will order Chocolate Chip Cookie Dough?
7/10
You flip a coin 100 times, and 33 of those land on tails. What is the experimental probability of it landing on heads?
67/100
You have a bag with 10 blue marbles, 3 green marbles, 2 red marbles, and 5 yellow marbles. What is the probability that you will randomly select a yellow marble, put it back, then select a green or red marble?
1/16
You flip a coin 4 times. How many times would you expect the coin to land on tails?
2
You walk into Subway to get a sandwich. You the following choice:
Bread: wheat or white
Meat: turkey, ham, roast beef
Cheese: swiss, cheddar, american
Condiments: mayo or mustard
Veggies: tomatoes, lettuce, onions, pickles
How many possible outcomes are there if you randomly select one of each category?
144
You roll 3 dice. What is the probability of rolling 7?
0
You flip a coin 3 times. What is the probability of it landing on heads all 3 times?
1/8
You have a bag of 1 green marble, 3 orange marbles, 2 purple marbles, and 3 pink marbles. You select a marble without looking and then put it back. If you do this 9 times, what is the best prediction possible for the number of times you will pick a green marble?
1