Probability

Question 1

What does mutually exclusive mean?

Answer 1

Cannot happen at the same time.
Eg. Being even and odd
Prime and square
Club and spade

Question 2

What do you do if two events are mutually exclusive?

Answer 2

You add them:

P(A or B) = P(A) + P(B)

Question 3

What are independent events?

Answer 3

Two events are independent if the outcome of one doesn’t affect the other.

Question 4

What do you do if two events are independent?

Answer 4

You multiply them:

P(A and B) = P(A) x P(B)