STA255H1 Final: quiz1_255_w19_soln
Document Summary
Instructions: this is an open-book quiz; it is worth 3 points and you have 8 minutes to complete it. No electronic devices with possible internet access, such as phone, tablets and computers are allowed but non-programmable scienti c calculators are allowed. Answers will vary: use the axioms of probability to show that if a and b are events such that b a, then. A = a s = a (b b) = (a b) (a b) where (a b) (a b) = . P (a) = p (a b) + p (a b). Since b a, p (a b) = p (b). Since a and b are events, then by axiom 1, p (a) 0 and.
