The prevalence of blood types in the us population is o+: 37.4%, a+: 35.7%, b+: 8.5%, ab+: 3.4%, o–: 6.6%, a–: 6.3%, b–: 1.5%, and ab–: 0.6%. 1) a sample of 24 subjects is randomly selected from the us population. what is the probability that 8 subjects are a+. random variable x describes the number of a+ subjects among 24 selected. find ex and var x.

x=-7

step-by-step explanation:

x+3=-10

-10+3=-7

x=-7

answer: b.36 feet

step-by-step explanation:

answer: bea's uncle is 25 years old.

step-by-step explanation:

given the equation , we can say that the variable "x" represents the age of bea's uncle. then to find his age, we need to solve for "x":

we must add 15 to both sides of the equation:

now we need to divide both sides of the equation by 3:

therefore, we can conclude that bea's uncle is 25 years old.

no

step-by-step explanation: