bonanova Posted June 12, 2014 Report Share Posted June 12, 2014 Fifty school children lined up at random in five rows and ten columns. No two of the children have the same birthday. Of the oldest children in each column Pete is the youngest. Of the youngest children in each row Jane in the oldest. What is the probability that Pete is older than Jane? Quote Link to comment Share on other sites More sharing options...

0 harey Posted June 13, 2014 Report Share Posted June 13, 2014 Let's call Wilhelm the kid - in the same column as Pete (Pete is older than Wilhelm) AND - in the same row as Jane (Wilhelm is older than Jane) 1 Quote Link to comment Share on other sites More sharing options...

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## bonanova

Fifty school children lined up at random in five rows and ten columns.

No two of the children have the same birthday.

Of the oldest children in each column Pete is the youngest.

Of the youngest children in each row Jane in the oldest.

What is the probability that Pete is older than Jane?

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