Simple Probability
What is the lowest probability value?
0
What is theoretical probability?
What we expect to happen?
What is experimental probability?
Probability based on results of experiment.
Using a 12 Sided die, what is the probability of rolling a 5? Answer as a fraction.
1/12
What is the highest probability value?
1
The days of a week are put into a bag. What is the probability of picking a day that starts with T?
2/7
0.286
28.6%
2/5
0.4
40%
When rolling a 6 sided die, what is the probability of it landing on a multiple of 2? Answer in the form of a decimal.
0.5
Probability can be written as?
Fraction, decimal, or percent.
There are 3 blue marbles, 5 red marbles, and 2 green marbles. What is the probability of picking a blue marble? Write it as a decimal, fraction, or percent (Bonus 100 for writing it as all 3).
3/10
0.3
30%
Cards were picked from a deck at random. In 15 tries, Spades were picked 5 times, Diamonds were picked 3 times, Hearts were picked 4 times, and Clubs were picked 3 times. What is the probability that I pick a diamond as the next card?
1/5
0.2
20%
When grabbing a number out of a bag, what is the probability of grabbing a multiple of 3, when the bag is full of cards ranging from 1-10?
3/10
What do we use as our denominator for finding probability?
# of total possible outcomes
When rolling a die, what is the probability of rolling a 4 or less?
2/3
.66
66.66%
If you roll a die and 5 of 20 times it landed on a 2. How many times can you expect it to land on a 2 if you roll the die a total of 40 times?
About 10 times.
Using a spinner, what is the probability of landing on a prime number if it was labeled from 1-20? Answer in the form of a percent.
40%
# of favorable outcomes
What is the probability of picking an even number in a deck of cards? There are four suits and Face cards do not count as evens. Answer as a fraction in simplest form.
5/13
The letters of AKASAKI were put into a bag. Letters were picked 20 times. A was picked 8 times, K was picked 6 times, S was picked 2 times, I was picked 4 times. If it was tried 100 times, how many times should I expect to pick the letter I?
The letters from the word FOOTBALL is put into a bag. What is the probability that you pick a vowel in one try? Answer as a decimal, fraction, and percent.
3/8
0.375
37.5%