C3_W2_A1 exercise 3

Course Q&A Math for Machine Learning Probability & Statistics for Machine Learning &...
1

I can’t for the life of me figure why I get an error for exercise 3. My sum value for “P for sum=5” is accepted but not the 3 before it.

If I understand it, there should be 2 out of 16 for 2|8, 4 out of 16 for 3|7, and 6 out of 16 for 4|6, and yet after doing that simple division I get an error saying it’s not within the 0.01 bounds.

IDK.

2

I am also having trouble with this exercise.
I am getting the right answer for sum=5 but not for the others.
How should we interpret 2|8?
Is it calculating the probabilities of the two rolls adding 2 or 8?
If so, my solution is not working…

Jorge

3

Yes, I am having the same issue here - this is a fairly straightforward examination of the probability space - I keyed in the equivalent probability but only got an overall 3/10. Is this to do with my interpretation of 2|8? Is this some sort of conditional probability that I am missing here?

4

Interpret P of sum for 2 | 8 as probability of sum for ONLY 2 or ONLY 8. Don’t consider both of them.

2 Likes
5

Thanks @emissaryprog!

So they are basically asking for P of sum for 2, that happens to be the same as P of sum for 8. I personally think that the description can be more clear.

I submitted the assignment using your advice and got 100%.

Thanks again!

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8

@Kimia_Abbasloo, Please start a new thread, and post the details of your specific question.

10

Go to this link:

Then click on the correct Week number.

Then use the “New Topic” button.

11

Thank you so much, was having the same issue. The question description is not clear at all.