Colorblindness is any abnormality of the color vision system that causes a person to see colors differently than most people, or to have difficulty distinguishing among certain colors (www. visionrx. com). Colorblindness is gender-based, while the majority of sufferers being males.

Roughly 8% of white males have some form of colorblindness, while the incidence among white females is only 1%. A random sample of 20 white males and 40 white females was chosen.

Let X be the number of males (out of the 20) who are colorblind.

Let Y be the number of females (out of the 40) who are colorblind.

Let Z be the total number of colorblind individuals in the sample (males and females together).

Which of the following is true about the random variables X, Y, and Z? Check all that apply.

X is binomial with n = 20 and p = .08.

Y is binomial with n = 40 and p = .01.

Z is not binomial.