bonanova Posted February 15, 2013 Report Share Posted February 15, 2013 (edited) At the beach last summer my grandson filled his yellow pail with sand. He then scooped out a toy shovel full of sand with the intent to bury me. At the point in time, how "odd" was his pail shovel? His pail shovel was more likely than not to have an odd number of grains of sand. His pail shovel was less likely than not to have an odd number of grains of sand. His pail shovel was equally likely to have an even or odd number of grains of sand. Edited February 15, 2013 by bonanova Te inquire of the shovel, not the pail. Quote Link to comment Share on other sites More sharing options...
0 Yoruichi-san Posted February 15, 2013 Report Share Posted February 15, 2013 Assuming neither the pail or the shovel is empty, it's more likely to be odd, since an even original number of grains n can give n/2 possible odd/odd splits and n/2-1 even/even splits. If one could be empty and not the other, it's a 50/50 split (well, excluding the case of a single grain of sand originally). If either could be empty, it's more likely to be even. Quote Link to comment Share on other sites More sharing options...
0 bonanova Posted February 15, 2013 Author Report Share Posted February 15, 2013 Assuming neither the pail or the shovel is empty, it's more likely to be odd, since an even original number of grains n can give n/2 possible odd/odd splits and n/2-1 even/even splits. If one could be empty and not the other, it's a 50/50 split (well, excluding the case of a single grain of sand originally). If either could be empty, it's more likely to be even. Your solution is better than my statement of the puzzle. I meant, of course, to enquire as to the oddness of the grains in his shovel. Before he buried me. OP modified accordingly Quote Link to comment Share on other sites More sharing options...
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bonanova
At the beach last summer my grandson filled his yellow pail with sand.
He then scooped out a toy shovel full of sand with the intent to bury me.
At the point in time, how "odd" was his
pailshovel?- His
- His
- His
Edited by bonanovapailshovel was more likely than not to have an odd number of grains of sand.pailshovel was less likely than not to have an odd number of grains of sand.pailshovel was equally likely to have an even or odd number of grains of sand.Te inquire of the shovel, not the pail.
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