N people roll a die in turn, following a prearranged list. The first to get a 6 names the drink. The second to get a 6 drinks it. The third, pays! Then the next on the list rolls and so on till the closing time.

The above goes on for 120 minutes, averaging 5 rolls per minute (the time for naming, drinking, plus settling disputes and paying the bills was discounted).

How many times was it the same player that named the drink, consumed it but did not pay for it?

a. Provide your estimates for N=3, N=6 and N=12
b. Please explain the meaning of the results.

Rem: Verification of analytical results by simulation is welcome.

(In reply to Clarification needed by Steve Herman)

Your assumptions are in line with mine, so solve the puzzle taking in account that the last set(caller, drinker, payer )is not complete and should be discounted.

I believe the text implies such approach.

Posted by Ady TZIDON on 2016-02-23 15:37:59