It is estimated that 20% of the population of Gingerland have red hair. If 8 residents are chosen at random, what is the probability that... (assume each person is
independent)
a) exactly 6 of them have red hair?
b) less than 6 of them have red hair?
c) at least one of them has red hair?
Round your answers to the nearest thousandth (3 decimal places).
answer part (a) only in this blank.
Your
.001
Answer
Question 7 (1 point)
Answer 6(b) here:
Question 8 (1 point)
Answer 6(c) here:

Using pert, adam munson was able to determine that the expected project completion time for the construction of a pleasure yacht is 21 months, and the project variance is 4. a) what is the probability that the project will be completed in 17 months? b) what is the probability that the project will be completed in 20 months? c) what is the probability that the project will be completed in 23 months? d) what is the probability that the project will be completed in 25 months? e) what is the due date that yields a 95% chance of completion?