Hi!

Problem: A die is rolled twice. Let denote the sum of the two numbers that turn up, and the difference of the numbers (specifically, the number on the first roll minus the number on the second roll). Show that

Are and independant?

Thanks

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- Nov 18th 2009, 03:00 PMTwigExpected Value
Hi!

Problem: A die is rolled twice. Let denote the sum of the two numbers that turn up, and the difference of the numbers (specifically, the number on the first roll minus the number on the second roll). Show that

Are and independant?

Thanks - Nov 18th 2009, 03:10 PMmr fantastic
Use this table: Dice table

to get the distribution for X, Y and XY. Then calculate the required expectations. - Nov 18th 2009, 03:28 PMTwig
Thank you

- Nov 18th 2009, 06:56 PMFocus