6. Statistics and Probability

Probability Basics — Quiz

Test your understanding of probability basics with 5 practice questions.

Practice Questions

Question 1

A bag contains 5 red balls and 7 blue balls. If two balls are drawn without replacement, what is the probability that the first ball is red AND the second ball is blue?

Question 2

Events A and B are such that $P(A) = 0.6$, $P(B) = 0.4$, and $P(A|B) = 0.7$. What is $P(A \cap B)$?

Question 3

A fair six-sided die is rolled. Let event A be 'rolling a number less than 5' and event B be 'rolling an odd number'. What is $P(A \cup B)$?

Question 4

A box contains 8 red, 6 blue, and 4 green marbles. If three marbles are drawn randomly without replacement, what is the probability that all three are red?

Question 5

Given two independent events A and B, if $P(A) = 0.5$ and $P(B) = 0.6$, what is the probability of A occurring but not B?