1.Suppose the buying power of a dollar decreases by4% this year. What is the rate of inflation this year? Round your answer to the nearest tenth of a percent.

The percent rate of inflation =

2.You have a plate of50cookies. Ten have chocolate chips and12have pecans. Of the cookies mentioned in the preceding sentence,4have both chocolate chips and pecans. You select a cookie at random. What is the probability that your cookie has chocolate chips or pecans?

P(chocolate chips or pecans) =

3.Consider the experiment of tossing three coins.

What is the probability of getting at least one tail?