Question 4

In a large city, 18,000 workers lost their jobs last year. Of them, 7900 lost their jobs because their companies closed down or moved, 4000 lost their jobs due to insufficient work, and the remainder lost their jobs because their positions were abolished.

a. If one of these 18,000 workers is selected at random, find the probability that this worker lost his or her job because the company closed down or moved. Round your answer to three decimal places.

The probability is Enter your answer in accordance to the question statement .

b. If one of these 18,000 workers is selected at random, find the probability that this worker lost his or her job due to insufficient work. Round your answer to three decimal places.

The probability is Enter your answer in accordance to the question statement .

c. If one of these 18,000 workers is selected at random, find the probability that this worker lost his or her job because the position was abolished. Round your answer to three decimal places.

The probability is Enter your answer in accordance to the question statement .

Do these probabilities add up to 1.0?

Select answer from the options below

Yes

No

Question 5

A sample of 820 adults showed that 57 of them had no credit cards, 154 had one card each, 79 had two cards each, 33 had three cards each, 76 had four cards each, and 421 had five or more cards each. Suppose one adult is randomly selected from these 820 adults. Find the probability that this adult has exactly three credit cards.

Round your answer to two decimal places. ()=