Suppose we have a bag with 10 slips of paper in it. Eight of these have a 3 on them and the other two have a 9 on them.

a) What is the expected value of the number shown when we draw a single slip of paper?

b)What is the expected value of the number shown if we add one additional 9 to the bag?

somehelpplease Mar 7, 2020

#2**+1 **

I think the expected value would be 3 x 1/10 = .3 there are 8 of these = .24

9 x 1/10 = .9 there are 2 of these = 1.8 sum = 4.2

(8x 3 + 2 x 9 ) / 10 = 4.2

now add a '9' piece of paper 3 x 1/11 x 8 = 2.1818

9 x 1/11 x 3 = 2.4545 sum = 4.63

[(8x3)+(3x9)]/11 = 4.63

ElectricPavlov Mar 7, 2020