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Given the code: file = open(“data.txt”, “r”) line = file.readline() What does readline() do?

In a population, 20% have a certain medical condition. The test for the condition has a false positive rate of 10% and a true positive rate of 95%. What is the probability that a random person’s test result is positive? Your answer should contain 4 digits after the decimal.  

Five blue marbles and seven red marbles are held in a single container. Marbles are randomly selected one at a time and not returned to the container.  What is the probability that at least two red marbles will be chosen in the first three selections? show what numbers you add/subtract/multiply/divide to get the final answer. For example, 3/8*1/2 + 1/4*5/6 = .3958

Which of the following are safety modes on the PB 980: I. Disconnect ventilation II. Safety ventilation III. Apnea ventilation IV. Safety valve open

In a tour group of 150 tourists, 60 tourists can speak Spanish, 40 tourists can speak French, and half of the tourists speak neither language. How many tourists in the tour group speak both Spanish and French?

In a tour group of 150 tourists, 50 tourists can speak Spanish, 48 tourists can speak French, and half of the tourists speak neither language. How many tourists in the tour group speak both Spanish and French?

If two events E and F are mutually exclusive and exhaustive, and P(E)=0.35, what is the probability P(F)?

Upon mixing, hexanes and water form two layers, base on the table in your handout, which layer is which?

As noted in the text, list five examples of types of compensation for the dental hygienist.

When a dental hygienist takes the initiative, plans, and prepares for an interview, he or she is being  [BLANK-1]