Question

Although cities encourage carpooling to reduce traffic congestion, most vehicles carry only one person. For example, 72%of vehicles on the roads are occupied by just the driver. (Round your answers to four decimal places.)

(b) If you choose 110 vehicles at random, what is the probability that more than half (that is, 56 or more) carry just one person? (Use the normal approximation.)

Answer 1

Ans:

n=110

p=0.72

z=(0.5-0.72)/sqrt(0.72*(1-0.72)/110)

z=-5,14

P(z>-5.14)=1.0000