Question 1168715
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(a)  The event  (A or B) is this set  {1,2,4,6}.


      It consists  of 4 possible disjoint outcomes, each with the probability of  {{{1/6}}}.

      Therefore,  P(A or B) = {{{4/6}}} = {{{2/3}}}.      <U>ANSWER</U>




(b)  The event  (A and B) is this set  {2},  consisting of 1 (one)  outcome with the probability  {{{1/6}}}.

      Therefore,  P(A and B) = {{{1/6}}}.          <U>ANSWER</U>
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Solved, answered and explained.