SOLUTION: On some busy streets, diamond lanes are reserved for taxis, buses, and cars with three or more passengers. It is estimated that 20% of cars travelling in a certain diamond lane hav
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Question 1205733: On some busy streets, diamond lanes are reserved for taxis, buses, and cars with three or more passengers. It is estimated that 20% of cars travelling in a certain diamond lane have fewer than three passengers.
a. Is the variable in the question discrete or random? Justify your answer.
If 60 cars that travel in a certain diamond lane are selected at random, find the probability that:
b. exactly 10 cars have less than 3 passengers.
c. fewer than 10 cars have less than 3 passengers.
(Hint: Check criteria for normal approximation.)
d. at least 15 cars have fewer than 3 passengers.
(Please help) Answer by ikleyn(52803) (Show Source):
