Section 2.3

Question 1

the word ‘or’ in probability means what?

Answer 1

if the sample points are mutually exclusive we can jus add the probabilities

Question 2

what does mutually exclusive mean?

Answer 2

if two events can’t happen at the same time

Question 3

p(a or b) for mutually exclusive events?

Answer 3

p(a)+p(b)

Question 4

P(a or b) for normal events?

Answer 4

P(a) + P(B) - P(a and b)