Y2 Ch2- Conditional Probability

Question 1

For independent events,
P (A n B) = ?
P (A l B) = ?

Answer 1

P (A n B) = P (A) x P(B)
P (A l B) = P (A)

Question 2

For mutually exclusive events,
P (A n B) = ?
P (A u B) = ?

Answer 2

P (A n B) = 0
P (A u B) = P (A) + P (B)

Question 3

P (A l B)

Answer 3

P (A n B) / P (B)

Question 4

P (A u B)

Answer 4

P (A) + P (B) - P (A n B)