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All 10 digits (Posted on 2012-07-06) Difficulty: 3 of 5
Pi takes 33 digits to get all 10 digits.
However, e only takes 21 digits.
Suppose you pick random digits from 0 to 9 with probability 1/10 of each digit. What is the average number of digits required to get all 10 digits?

See The Solution Submitted by Math Man    
Rating: 5.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re: Leading answer (spoiler) | Comment 4 of 5 |
(In reply to Leading answer (spoiler) by Steve Herman)

It is OK to start with 0. Therefore, the first answer is correct.

  Posted by Math Man on 2012-07-08 23:08:00
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