Friday, November 06, 2009

You're gonna hit something, but that's the way it goes

A Korean woman passed her multiple-choice driving exam on the 950th try.

She had to get 30 out of 50 multiple choice questions right.

Clearly she wasn't just guessing randomly. Assuming four answer choices per question, on average it would take 6,089,075 tries to pass by guessing randomly on every question.

If she usually knew about 11 of the 50 answers and guessed randomly on the rest, that would be consistent with passing after about 950 tries.


At 2:15 PM, February 06, 2011, Anonymous Audrey said...

People like that make me scared to drive. Interesting the way you figured out the statistics though!


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