Basics

Question 0

What are the 2 ways to define P[A]?

Answer 0

1) P[A] = P[A and B’] + P[A and B]

2) P[A] = 1 - P[A’]

Question 1

What is DeMorgan’s Law?

Answer 1

(A and B)’ = (A’ or B’)

A or B)’ = (A’ and B’

Question 2

P[A and B] = ???

Answer 2

P[A] + P[B] - P[A or B]

Question 3

P[A or B] = ???

Answer 3

P[A] + P[B] - P[A and B]

Question 4

What is the mode of a PMF/PDF?

Answer 4

It is the number that maximizes the function.