0.8 = 8/10 = 4/5.
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The probability of a specific sequence of six consecutive decimal digits occurring early in the decimal representation of pi is usually only about 0. 08% (or more precisely, about 0. 0762%). However, if the sequence can overlap itself (such as 123123 or 999999) then the probability is less. The Feynman point is the first occurrence of four and five consecutive identical digits, but not six.
The correct answer is 10*9/2 = 45. The 45 are: 01, 02, 03, 04, 05, 06, 07, 08, 09 12, 13, 14, 15, 16, 17, 18, 19, 23, 24, 25, 26, 27, 28, 29, 34, 35, 36, 37, 38, 39, 45, 46, 47, 48, 49, 56, 57, 58, 59, 67, 68, 69 78, 79, 89. In a combination, the order of the elements DOES NOT MATTER.