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February 23, 2015

Playing with Invisible Dice

You have 2 dice. One regular die and a an invisible die. Numbers 1 to 6 are written on the regular die.But you don't know what's written on the invisible dice.
After tossing both, I speak the sum of outcome of both die. It so happens that the outcome is always an integer between 1 to 12, with equal probability (1/12 each).
Can you guess what are the numbers printed on special invisible dice?

4 comments:

Jerry Critter said...

Three zeros and three sixes on the invisible die.

February 23, 2015 at 10:13 AM
Anonymous said...

three 0s and three sixes

February 23, 2015 at 9:40 PM
Anonymous said...

How?

February 23, 2015 at 11:58 PM
JyRKS said...

When you have three 0's and three 6's on the sides of the invisible dice, then you get equal chances of getting any number from 1 - 12.

You have 50% of getting a 0 or a 6 on the invisible dice and 16.67% chance of getting any number from 1-6 on the visible dice.

Totaling 8.33% chance to roll any number from 1 - 12.

For an example you can roll 1 and 0 or 6 and get 1 or 7.

Roll 4 and 0 or 6 and get 4 or 10.

This way you have 8.33% equal chance to roll any number.

March 7, 2015 at 2:52 PM

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