# Question

The following probability model shows the distribution for the number of rooms in U.S. housing units.
Rooms .... Probability
One ..... 0.005
Two ..... 0.011
Three ..... 0.088
Four ..... 0.183
Five ..... 0.230
Six ..... 0.204
Seven .... 0.123
Eight or more . 0.156
(a) Verify that this is a probability model.
(b) What is the probability that a randomly selected housing unit has four or more rooms? Interpret this probability.
(c) What is the probability that a randomly selected housing unit has fewer than eight rooms? Interpret this probability.
(d) What is the probability that a randomly selected housing unit has from four to six (inclusive) rooms? Interpret this probability.
(e) What is the probability that a randomly selected housing unit has at least two rooms? Interpret this probability.

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