Which of the following is an example of choosing a random sample from a target population of 100 students of which 40 are boys and 60 are girls? A. Choosing every other person on an alphabetical list of names.
B. Choosing every 10th person from the list.
C. Separating the group into groups of boys and girls and randomly choosing 5 boys and 5 girls from each group.
D. Tossing a number cube for each name on the list and choosing those names that corresponded to a 2, 4, or 6.

mxb67

step-by-step explanation:

answer: 12

step-by-step explanation:

because yes

delaney would like to make a 5lb nut mixture that is 60% peanuts and 40% almonds.

she has several pounds of peanuts and several pounds of a mixture that is 20% peanuts and 80% almonds.

let 'p' represent the number of pounds of peanuts needed to make the new mixture, and  

let 'm' represent the number of pounds of the 80% almond-20% peanut mixture.

:

p + m = 5

therefore

m = (5-p)

write an equation based on the percent of peanuts

1p + .2m = .6(5)

replace m with (5-p)

p + .2(5-p) = .6(5)

p + 1 - .2p = 3

p - .2p = 3 - 1

.8p = 2

p = 2/.8

p = 2.5 lbs of peanuts required

then

5 - 2.5 = 2.5 lbs of the peanut/almond mixture required

:

a) what is the system that models this situation?

p + m = 5

1p + .2m = .6(5)