Simple Probability
Probability of rolling 2 or 3 with a standard die
1/3
A standard die is rolled 20 times. Theoretically, what is the probability that the next roll will be even?
1/2
How many ways can Mason make his elective schedule if he can choose from photography, journalism, art, or marketing as his first elective and keyboarding or chorus as his second elective?
8
A coin is tossed, then a standard die is rolled. What is P(Heads, even)?
1/4
A bag contains 3 quarters, 5 dimes, 8 nickels, and 4 pennies. What is the probability of drawing a quarter, putting it back in the bag, and then drawing a nickel?
3/50
Probability of randomly selecting a vowel from the word FIRECRACKER
4/11
A standard die is rolled 25 times. The results are shown. Experimentally, what is the probability that the next roll will be even?
Roll Frequency
one 3
two 4
three 8
four 2
five 3
six 5
11/25
To access their grades in the gradebook, each student is given a unique code that contains three letters followed by one digit. How many codes are possible?
175,760
A month of the year is chosen. Then a day of the week is chosen. Find P(Month ending in y, Day starting with T)
2/21
A bag contains 3 quarters, 5 dimes, 8 nickels, and 4 pennies. What is the probability of drawing a quarter, keeping it, and then drawing a nickel?
6/95
Probability of not getting a 5 when rolling a standard die
5/6
If you rolled a standard die 30 times, theoretically, how many rolls should land on 4?
5
A standard die is rolled, then a coin is tossed. How many outcomes are possible?
12
A coin is tossed. Then a standard die is rolled. Find P(Tails, 7)
0
A bag contains 3 quarters, 5 dimes, 8 nickels, and 4 pennies. What is the probability of drawing a quarter, putting it back in the bag, and then drawing another quarter?
9/400
Sarah has been late for work 9 out of the last 30 days. Based on this, what is the probability that she will be on time for work on any given day?
7/10
Given the results below, according to this experiment, how many times should a standard die land on 4 if you rolled it 40 times?
Roll Frequency
one 3
two 4
three 8
four 2
five 3
six 5
3
A month of the year is randomly selected. Then a day of the week is randomly selected. How many different combinations are possible?
84
In the last 10 presidential elections, the democratic candidate has won six times in Michigan and four times in Ohio. What is the probability that the democratic candidate wins both Michigan and Ohio in the next presidential election?
6/25
A bag contains 3 quarters, 5 dimes, 8 nickels, and 4 pennies. What is the probability of drawing a quarter, keeping it, and then drawing another quarter?
3/190
A ball is randomly selected from a bucket containing balls with the numbers 1-20 on them. What is the probability that the selected ball has a multiple of 3 on it?
3/10
In an experiment a coin was flipped 50 times. It landed on heads 38 times. What is the experimental probability of landing on tails?
6/25
A password is made using two letters followed by 3 digits. How many different passwords are possible?
676,000
A coin is tossed 4 times. Find P(all heads)
1/16
A bag contains 3 quarters, 5 dimes, 8 nickels, and 4 pennies. What is the probability of drawing three dimes, one at a time, without putting them back?
1/114