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Dates data distribution (Posted on 2015-01-05) Difficulty: 3 of 5
Consider all possible dates (formatted DD/MM/YY) within a span of a century , from 01/01/01 to 31/12/00 (20th century!).
In this period there are N k dates that can be expressed by k distinct digits, e.g. N1=1 (11/11/11).

a. Derive the values of N k for all other values of k (2 to 6).
b. What is the average k for the 20st century?
c. How about the 21st century?

No Solution Yet Submitted by Ady TZIDON    
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  Subject Author Date
re(2): computer-aided solutionCharlie2015-01-05 21:18:59
Hints/Tipsre: computer-aided solutionAdy TZIDON2015-01-05 17:55:54
Solutioncomputer-aided solutionCharlie2015-01-05 15:54:59
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