About 16% of people who get their feet examined are found to have athlete's foot. What is the probability of a podiatrist examining five people until he finds the first patient who has athlete's foot?

(0.16)5
(0.84)4(0.16)1
(0.16)4(0.84)1
(0.84)5
1 − (0.16)4

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.

Find the unit rate for: 75% high-fiber chimp food to 25% high -protein chimp food.