A hot dog vendor at Wrigley Field sells hot dogs for
$1.50 each. He buys them for $1.20 each. All the hot dogs
he fails to sell at Wrigley Field during the afternoon can be
sold that evening at Comiskey Park for $1 each. The daily
demand for hot dogs at Wrigley Field is normally distributed
with a mean of 40 and a standard deviation of 10.
a) If the vendor buys hot dogs once a day, how many
should he buy?
b) If he buys 52 hot dogs, what is the probability that he
will meet all of the day’s demand for hot dogs at Wrigley?
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