three persons on board
What do you think he means
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Posted 14 January 2012 - 08:47 PM
Posted 15 January 2012 - 10:15 AM
Posted 15 January 2012 - 10:21 AM
If it is the boat driver PLUS exactly three passengers, the solution is too easy and costs way less than the $66 total available:Spoiler for Driver Plus 3 Passengers SolutionI name family 1 Smith, so we have SF for Smith Father, etc. Family two is Jones, so we have JM for Jones Mother, etc.
Begin with Smiths plus the boat on the left side, Jones family on the right.
SF SM SS SD SB * JF JM JS JD JB
Smith pays $6 for the Son, Daughter, and Baby to cross.
SF SM * SS SD SB JF JM JS JD JB
Now Jones pays $6 for their Son, Daughter, and Baby to cross.
SF SM JS JD JB * SS SD SB JF JM
Smith pays $13 for the Smith Father and Mother plus the Jones Daughter to cross.
JS JB * SF SM SS SD SB JF JM JD
Now Jones pays $13 for Father, Mother and Daughter to cross.
JF JM JS JD JB * SF SM SS SD SB
$19 each paid, $14 left in pockets for Dinner at McDonalds!
If you double check your first solution third and forth trips, the steps I changed to red, F M & D only total a cost of $11 so your solution is mine for achieving $34. I did trips in slightly different order but with same results
Well, given thoughtfulfellow's response, I now must assume that wolfgang meant that there was a GRAND TOTAL of $33 between the two families' funds. Therefore, my solutions cost $38 and $34, respectively. That also means that thoughtfulfellow spent $4 less on his "Driver + 3 Passengers" solution (I'd like to see it). Oh, well. Back to the drawing board.
(and, post-posting, I see mewminator's comment to the same effect. Thank you, mewminator.)
Edited by thoughtfulfellow, 15 January 2012 - 10:22 AM.
Posted 15 January 2012 - 12:06 PM
Edited by wolfgang, 15 January 2012 - 12:13 PM.
Posted 15 January 2012 - 12:30 PM
Posted 15 January 2012 - 01:40 PM
Posted 15 January 2012 - 04:30 PM
Some inconclusive analysisSpoiler for What I seeIn order to insure 3 passengers on every trip, someone must travel across the river, back to original side and another trip to get to the desired side.
With the $33 limit, this person crossing both ways extra must be the baby.
Edited by Morningstar, 15 January 2012 - 04:31 PM.
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