Amedical company is trying to determine whether a new treatment could prevent high blood pressure. company managers know that either an engineered or a natural drug will be used. they also know that one of two illnesses result in high blood pressure. an experiment will compare all combinations of these choices. males and females will be subjected to each treatment and scored for quality. what are the treatments?

answer:   c ?

step-by-step explanation:

there is only one way to arrange all the eight relative to each other because they are not distinct. we have

now there are nine places to place an (and not more than one in one place).   because we have four symbols, we need to choose four of these nine places to insert an . order does not matter because the are not distinct.

thus there are 1 · c(9,4) ways, or, if we calculate it,

thus there are 126 ways to form such "words."