HCR's Rank Formula by H.C. Rajpoot-2014
Algebra
Level
pending
All the 12-digit numbers, obtained by permuting 0, 0, 0, 0, 2, 2, 3, 4, 5, 6, 6, 6 together, are arranged in decreasing order. How many numbers are lying between 456006326020 & 665030642200 in the same order?
The answer is 582545.
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
1 solution
HCR's Rank Formula-2 (Rank of Selective Linear Permutations)/ proposed by H. C. Rajpoot /20/11/2014
Q.No.1: Find out the rank in the increasing order of a randomly selected number 58014408 from the set of all the 8-digit numbers, arranged in increasing order, obtained by the digits 0, 1, 4, 5, 8, 9. Repetition of the digits is allowed in the permutations.
Q.No.2: Find out the total 8-digit numbers lying between 20227702 & 75007007 randomly selected from the set of all the 8-digit numbers, arranged in increasing order, obtained by the digits 0, 2, 5 & 7. Repetition of the digits is allowed in the permutations.