Question

I'm confused what this is asking me?↓↓↓

Answer 1

I think I see what they mean.

Answer 2

If you roll two dice and then multiply the numbers together, you will get some product. The table gives you the probability of getting a particular product.

Answer 3

For example, the probability of getting 27 is 0, because the only factors of 27 are 3 and 9, and you don't have a 9 on a regular die.

Answer 4

But some of the other numbers given can be created. For example, 24. It can be made by 6 and 4, and the probability of getting 24 is 1/18.

Answer 5

So, think about the numbers they gave as products.

Answer 6

Can you even get a product that has a fractional part?

Answer 7

Since the numbers on the dice are whole numbers, when you multiply them together you would expect to get a whole number product.

Answer 8

so 12?

Answer 9

with the options it gives

Answer 10

That's what I think it must be, since you wouldn't expect a fractional value.

Answer 11

Since those would be impossible.

Answer 12

thank you that makes sense :)

Answer 13

Well, that is my logic anyhow. :)

Answer 14

I am not 100% sure I am correct, but it is the only answer that made sense to me. :)

Answer 15

On the other hand

Answer 16

I just found this: formula for expected value

Answer 17

http://statistics.about.com/od/Formulas/a/What-Is-The-Formula-For-Expected-Value.htm

Answer 18

If we use that formula, you would multiply each possible value by the number of times it appears in the table

Answer 19

So if we do that: 0(0) + 2(1/18) + 3(1/18) + 4(1/12) + 5(1/18) + 6(1/9) + 7(0) + 8(1/18) + 9(1/36) + 10(1/18) + 11(0) + 12(1/9) + 13(0) + 14(0) + 15(1/18) + 16(1/36) + 17(0) + 18(1/18) + 19(0) + 20(1/18) + 21(0) + 22(0) + 23(0) + 24(1/18) + 25(1/36) + 26(0) + 27(0) + 28(0) + 29(0) + 30(1/18) + 31(0) + 32(0) + 33(0) + 34(0) + 35(0) + 36(1/36)

Answer 20

Then see what that gives us

Answer 21

2/18 + 3/18 + 4/12 + 5/18 + 6/9 + 8/18 + 9/36 + 10/18 + 12/9 + 15/18 + 16/36 + 18/18 + 20/18 + 24/18 + 25/36 + 30/18 + 36/36

Answer 22

12.22?

Answer 23

You are faster than I am :)
I am still checking.

Answer 24

i just plugged what you wrote into google

Answer 25

That's what I got as well, but it isn't one of the answers.

Answer 26

However I followed the formula given

Answer 27

And I think the answer must be 12.

Answer 28

hmmm i'll try 12.25 and see what it says

Answer 29

Ok :)

Answer 30

I left off 1/36, I just realized

Answer 31

And that could bump it up to 12.25

Answer 32

Yes, it does :D

Answer 33

it does

Answer 34

thank you!

Answer 35

You are welcome! I was learning as well.

Answer 36

And apparently my "whole number" approach was in error, so I am glad I checked!

Answer 37

So, did it accept 12.25 as the correct answer?

Answer 38

i still have to answer one more question one sec

Answer 39

Oh, ok.

Answer 40

Yep it did thanks!

Answer 41

Good :D

Answer 42

Hope you have a good night!

Answer 43

you too!

Answer 44

Thanks!