jump to navigation

## Problem of the Day #222: INVersIoNs, iNveRsIoNS, InVeRsIoNsOctober 27, 2011

Posted by Albert in : potd , trackback

Bessie the Cow is given a sequence of numbers $1 \ldots 10$ and is told she can do a swap of a pair of numbers in that sequence $5$ times. Dessie, Bessie’s friend, has to guess the sequence after Bessie has applied the inversions. Find Dessie’s chance of being correct.

## Comments»

no comments yet - be the first?