Let B be the number of black forest cakes Ellie makes each day. From historical data, We know that E[B] = 10 and var(B) = 4. It takes 4 hours for Ellie to prepare ingredients for all the cakes and 6 minutes to assemble each cake. Let Y be the total time (in hours) Ellie spends making all the black forest cakes each day.
(a) write an expression for Y in terms of B .
(b) Give a lower bound for the probability that the total time to make all the cakes each day is between 1 and 9 hours.

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a b Using ... View the full answer