Probability

Question 1

Expected frequency =

Answer 1

Probability x number of trials

Question 2

The probability of events A and B happening

Answer 2

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

Question 3

The probability of event A or B happening (exclusive events)

Answer 3

= p(A) + P(B)

Question 4

The probability of events A or B happening

Answer 4

= P(A) + P(B) - P(both)

Question 5

P(AuB) =

Answer 5

P(A) + P(B) - P(AnB)