Introduction to Probability

Question 1 out of 12.
You have a bag of marbles. There are 3 red marbles, 2 green marbles, 7 yellow marbles, and 3 blue marbles. What is the probability of drawing a blue marble?

Question 2 out of 12.
You have a bag of marbles. There are 3 red marbles, 2 green marbles, 7 yellow marbles, and 3 blue marbles. What is the probability of drawing a yellow or red marble?

Question 3 out of 12.
You have a bag of marbles. There are 3 red marbles, 2 green marbles, 7 yellow marbles, and 3 blue marbles. What is the probability of drawing something other than a red marble?

Question 4 out of 12.
You throw 2 dice. What is the probability that the sum of the two dice will be 5?

Question 5 out of 12.
Select all that apply. Which of the following pairs are independent events?

 two coin flips

 a student's midterm and final grades in a class

 draw an ace, leave it out, then draw an ace again

 draw an ace, put it back, then draw an ace again

Question 6 out of 12.
You win a game if you roll a die and get an odd number and flip a coin and get tails. What is the probability that you win?

Question 7 out of 12.
You win $1 every time you flip a coin and get heads. You win $3 every time you roll a die and get a 5. You roll the die and flip the coin one time each. What is the probability that you win money from at least one game?

Question 8 out of 12.
A survey showed that 60% of all adults in your city take public transportation to work. If 3 people are chosen at random, what is the probability that they will all take public transportation to work?

Question 9 out of 12.
You win a game if you roll a 3 on at least one of your two dice. What is the probability that you win?

Question 10 out of 12.
If you throw a die four times, what is the probability that one or more of your throws will come up with a 4?

Question 11 out of 12.
What is the probability that you draw two cards from a deck and both of them are spades?

Question 12 out of 12.
You flip a coin three times. Is it more likely to get heads all three times or heads, then tails, then heads?

 HHH

 HTH

 They are both equally likely