Twenty-five percent of the customers entering a grocery store between 5 P.M. and 7 P.M. use an express checkout. Consider five randomly selected customers, and letxdenote the number among the five who use the express checkout.

(a) What isp(3), that is,P(x=3)? (Round the answer to five decimal places.)

p(3) =

(b) What isP(x1)? (Round the answer to five decimal places.)

P(x1) =

(c) What isP(2x)? (Round the answer to five decimal places. Hint: Make use of your computation in Part (b).)

P(2x) =

(d) What isP(x3)? (Round the answer to five decimal places.)

P(x3) =