বদলীকরণ যন্ত্র


You have an automated card shuffling machine. The machine is old and only works half the time when used. You input 5 cards in the machine, use it twice and take back the cards. The probability that the cards are in the same order as before is $\frac{m}{n}$ where $m$ and $n$ are coprime positive integers. Determine $m+n$


Probability  


  5 Upvotes                    2 Downvotes

Editorial



Need a hint? Checkout the editorial.

View Editorial


Statistics



Attempt 64


Solve 5


First Solve fahimfaisalbd75