2.99
See Answer

Refer to Exercise 4.45.

(a) If a fast food restaurant selected at random is found to comply with safety standards, what is the probability that it violates sanitary standards?

(b) If a restaurant selected at random is found to violate at least one of the two standards, what is the probability that it complies with safety standards?

Data from Exercise 4.45:

The following frequency table shows the classification of 58 landfills in a state according to their concentration of the three hazardous chemicals arsenic, barium, and mercury.

If a landfill is selected at random, find the probability that it has:

(a) A high concentration of barium.

(b) A high concentration of mercury and low concentrations of both arsenic and barium.

(c) High concentrations of any two of the chemicals and low concentration of the third.

(d) A high concentration of any one of the chemicals and low concentrations of the other two.