What is the probability that only one of the 20 new microwaves ...

[HCHenry]

What is the probability that only one of the 20 new microwaves sold will require a warranty repair in the first 90 days?

Question 2

An important condition when interpreting the coefficient for a particular independent variable X in a multiple regression equation is that:
 a. the dependent variable will remain constant
  b. the dependent variable will be allowed to vary
  c. all of the other independent variables remain constant
  d. all of the other independent variables be allowed to vary

[Zack0mack0101@yahoo.com]

Answer to Question 1

P(X = 1) = 0.3774

Answer to Question 2

c