If 60% of the population of the United States need to have their vision corrected, we say that the probability that an individual chosen at random from the population needs vision correction is P(C) ¼ 0.60.

a. Estimate the probability that an individual chosen at random does not need vision correction.

b. If 3 people are chosen at random from the population, what is the probability that all 3 need correction, P(CCC)?

c. If 3 people are chosen at random from the population, what is the probability that the second person does not need correction but the first and the third do, P(CNC)?

d. If 3 people are chosen at random from the population, what is the probability that 1 out of the 3 needs correction, P(CNN or NCN or NNC)?

e. Assuming no association between vision and gender, what is the probability that a randomly chosen female needs vision correction, P(CjF)?