From a pack of 9 cards numbered 1,2,3.......9 , three cards are drawn at random and laid on a table from left to right. What is the probability that the digits are drawn in descending order (by just using permutation)?
1 Answer
Oct 15, 2017
The probability is
Explanation:
There are
However, there are only
The reason this is
to lay the three cards in descending order. Therefore, the possibility is