Is Express Better?

Which is faster an express line with multiple shoppers or a regular line with one shopper who has a large basket? That question has obsessed California math teacher Dan Meyer for years. It's my Da Vinci Code, he says on his blog (http://blog.mrmeyer.com/?p=4646). What complicates the problem is that there are easily a dozen variables affecting the line speed that have nothing to do with the number

Which is faster — an express line with multiple shoppers or a regular line with one shopper who has a large basket?

That question has obsessed California math teacher Dan Meyer for years. “It's my Da Vinci Code,” he says on his blog (http://blog.mrmeyer.com/?p=4646).

What complicates the problem is that “there are easily a dozen variables affecting the line speed that have nothing to do with the number of customers

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