At an elementary school carnival, students can draw a rubber duck out of a tub of water. each duck has a number written on the bottom of it which correlates with a prize. there are a total of 8 ducks in the tub. two ducks have a 5 on them, four ducks have a 6 on them, and two duck has a 7 on it. what is the expected value of a duck?
a. 8.25
b. 6.85
c. 25
d. 4

4

Step-by-step explanation: I Am Almost Sure The Answer Is 4. I Did The Math Out And That Is What I Got.

step-by-step explanation:

answers available in this download

(pearson%2c%25202012)%2520bbs.pdf& usg=aovvaw1obmtxnfghfgxhx0urh_je

b. y = 4x - 2

step-by-step explanation:

to find a parallel equation to an equation, make sure both equations have the same slope but different y-intercepts.

y = 4x + 1

4 = slope

1 = y-intercept

y = 4x - 2

4 = slope

-2 = y-intercept

they both have the same slope but different y-intercepts, so, b. is the correct answer.

and to check your work, you can graph both equations. : )