Probability Power-Up 🎲

Math

Test your skills with simple, complementary, and compound (independent & dependent) probability problems.

100 XP
Reward
25
Questions
5–10 min
Time
Q1 Question 1 of 25

You roll a standard six-sided die. What is the probability of rolling a 4?

Q2 Question 2 of 25

You flip a fair coin. What is the probability of it landing on tails?

Q3 Question 3 of 25

A bag contains 5 red, 3 blue, and 2 green marbles. What is the probability of picking a blue marble?

Q4 Question 4 of 25

A spinner has 8 equal sections (1-8). What is the probability of spinning an even number?

Q5 Question 5 of 25

From a standard 52-card deck, what is the probability of drawing a King?

Q6 Question 6 of 25

You choose a letter from 'PROBABILITY'. What is P(B)?

Q7 Question 7 of 25

On an 8-section spinner (1-8), what is P(number > 5)?

Q8 Question 8 of 25

You roll a die. What is the probability of *not* rolling a 4? (Complementary Event)

Q9 Question 9 of 25

The forecast says there is a 20% chance of rain. What is the probability that it will *not* rain?

Q10 Question 10 of 25

A bag has 5 red, 3 blue, and 2 green marbles. What is P(not red)?

Q11 Question 11 of 25

From a 52-card deck, what is P(not a Heart)?

Q12 Question 12 of 25

A spinner has 10 sections (1-10). What is P(not 7)?

Q13 Question 13 of 25

The probability of guessing correctly is 1/4. What is P(guessing wrong)?

Q14 Question 14 of 25

You flip two coins. What is P(Heads and Heads)? (Independent Event)

Q15 Question 15 of 25

You flip a coin and roll a die. What is P(Tails and 6)? (Independent Event)

Q16 Question 16 of 25

Spinner 1 (1-4) has 4 sections. Spinner 2 (A,B,C) has 3 sections. What is P(2 and B)?

Q17 Question 17 of 25

A bag has 4 red and 6 blue marbles. You pick one, *put it back*, and pick another. What is P(Red, then Blue)?

Q18 Question 18 of 25

You draw a card, *put it back*, and draw another. What is P(Queen, then 7)?

Q19 Question 19 of 25

You roll two dice. What is P(1 on first, 1 on second)?

Q20 Question 20 of 25

A bag has 4 red and 6 blue marbles. You pick one, *do not put it back*, and pick another. What is P(Red, then Blue)?

Q21 Question 21 of 25

Same bag (4R, 6B), *without replacement*. What is P(Red, then Red)?

Q22 Question 22 of 25

You draw a card, *do not put it back*, and draw a second. What is P(King, then Queen)?

Q23 Question 23 of 25

From a 52-card deck, *without replacement*, what is P(Ace, then Ace)?

Q24 Question 24 of 25

A class has 10 boys and 12 girls. A teacher picks two students. What is P(Girl, then Girl)?

Q25 Question 25 of 25

A drawer has 8 white and 4 black socks. You pull one, *leave it out*, and pull another. What is P(Black, then White)?