According to a USA Today Snapshot, drivers say fixing or repaving streets is the best way to make their communities drivable-better than building new roads or adding lanes. Suppose that n = 15 drivers are randomly selected and x is the number who say that improved road conditions would make their communities more drivable. Let p = .4 when finding probabilities associated with any following outcomes:

a. What is the probability distribution for x?
b. What is P(x ‰¤ 4)?
c. Find the probability that x exceeds 5.
d. What is the largest value of c for which P(x ‰¤ c) ‰¤ .5?

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Drivers say fixing potholes or repaving streets is the best way to make their communities more drivable -more than Upgrades Drivers Say Would Make Their Communities More Drivable 40% 19% 19% 11% Improved Koad Conditions Better-Timed Traffic Signals More Highway Lanes Reduced Construction Delays building new % Improved Signage roads or adding lanes