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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?

  1. two coin flips
  2. a student's midterm and final grades in a class
  3. draw an ace, leave it out, then draw an ace again
  4. 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?

  1. HHH
  2. HTH
  3. They are both equally likely
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  • line 7292 of /lib/moodlelib.php: call to {closure}()
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