Select all that apply 10 points Blood type AB is the rarest

Last updated: 3/9/2024

Select all that apply 10 points Blood type AB is the rarest blood type occurring in only 4 of the population in the United States In Australia only 1 5 of the population has blood type AB Suppose a random sample of 50 U S residents and 40 Australians is obtained Consider the random variables described below X the number of US residents out of 50 with blood type AB Y the number of Australians out of 40 with blood type AB Z the total number of individuals out of 90 with blood type AB Which of the following is true about the random variables X Y and Z Check all that apply A OX is a binomial random variable with n 50 and p 0 04 B Y is a binomial random variable with n 40 and p 0 015 C OZ is a binomial random variable with n 90 and p 0 055