Suppose that3out of every 10 homeowners in the state of California has invested in earthquake insurance. Suppose15homeowners are randomly chosen to be interviewed.

(a)

What is the probability that at least one had earthquake insurance? (Round your answer to three decimal places.)

(b)

What is the probability that four or more have earthquake insurance? (Round your answer to three decimal places.)

(c)

Based on the empirical rule within what limits would you expect the number of homeowners insured against earthquakes to fall approximately 95% of the time? (Round your answers to the nearest whole number.)

_____ to_______