From experience you know that 83% of the desks in the schools have gum stuckbeneath them. In a random sample of 14 desks.a) Compute the probability that all of them have gum underneath.b) Compute the probability that 10 or less desks have gum.c) What is the probability that more than 10 have gum?d) What is the expected number of desks in the sample have gum?e) What is the SD of the number of desks with gum?

According to reports, 30% of American adults have chronic insomnia. If 3 American adults are chosen at random, what is the probability that all 3 have chronic insomnia?   A) 0.90 B) 0.027 C) 0.093 D) 0.075 E) 0.8437

For a week, a clothing company tracks the amounts spent by its customers, with the results shown to the right. a) What is the probability that a randomly chosen customer spent $120 or more? b) What is the probability that a randomly chosen customer did not spend less than $80? c) What is the probability that a randomly chosen customer spent between $40 and $159.99? a) What formula should be used to find the probability that a randomly chosen customer spent $120 or more? O A. P($120 or more) = 1 - P($120 - $159.99) O B. P($120 or more) = P($120 - $159.99) O C. P($120 or more) = P($120 - $159.99) + P($160-$199.99) - P($200 or more) O D. P($120 or more) = P($120 - $159.99) + P($160 - $199.99) + P($200 or more) The probability that a randomly chosen customer spent $120 or more is (Simplify your answer.) b) What formula should be used to find the probability that a randomly chosen customer did not spend less than $80? O A. P(not less than $80)=P($80 - $119.99) O B. P(not less than $80) = 1…

Of all the weld failures in a certain assembly, 80% of them occur in the weld metal itself, and the remaining 20% occur in the base metal. A sample of 20 weld failures is examined. a) What is the probability that exactly five of them are base metal failures? b) What is the probability that fewer than four of them are base metal failures? c) Find the mean number of base metal failures. Round the answer to one decimal place. d) Find the standard deviation of the number of base metal failures.

3. Write the last digit of your 1000 student ID number: 2 You know that in a specific population of rainbow trout 15% of the individuals carry intestinal parasites. Assume you obtain a random sample of 9 individuals from this population: a. Calculate the probability that) (last digit of your ID number) carry intestinal parasites. b. Calculate the probability that at least two individuals carry intestinal parasites. NOTE: you can still calculate "a" if your last digit is "0."

An unreliable company produces a large shipment of blenders where 13% have a defective motor, and 25% have a defective electrical cord and 5% have both defects. If you randomly select a blender in this shipment, find the probability that it has... a) only a defective electrical cord.  Write your answer as a percent rounded to 1 decimal place. b) a good motor.  Write your answer as a percent rounded to 1 decimal place. c) a good motor and a good electrical cord. Write your answer as a percent rounded to 1 decimal place.