perplexus.info :: Probability : All 10 digits

All 10 digits (Posted on 2012-07-06)

Pi takes 33 digits to get all 10 digits.
3.14159265358979323846264338327950
However, e only takes 21 digits.
2.71828182845904523536
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?

Submitted by Math Man

Rating: 5.0000 (1 votes)

Solution: (Hide)

7381/252=29.2896825396...

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
re(2): Leading answer (spoiler)	Charlie	2012-07-08 23:30:43
re: Leading answer (spoiler)	Math Man	2012-07-08 23:08:00
Solution the hard way and the easy way	Charlie	2012-07-06 13:22:55
Possible solution	broll	2012-07-06 11:34:42
Leading answer (spoiler)	Steve Herman	2012-07-06 10:40:16

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