How likely are two identical Scrabble hands?

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What are the odds of drawing the seven letters which spell "janitor" in a turn of Scrabble - in two separate games?

That happened to one More or Less listener, so presenter Tim Harford asked software designer Mike Thelen, who runs Zyzzyva, a word adjudication programme which is used at various Scrabble tournaments, to crunch the numbers.

More or Less is on BBC Radio 4 on Friday 9 September 2011 at 13:30 BST, and Sunday 11 September at 20:00 BST. Listen via the BBC Radio 4 website, or download the programme podcast.

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