statHomework Answers
a) Given a slot machine has 4 slots and after the push of a button each slot may show the three pictures of a cherry, a lemon or a star.
Therefore the number of elements in the sample space are 3*3*3*3=81
b) Let B be the event that exactly two lemons appears.
therefore n(B)=6
P(B)=6/81
=2/27
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