Data Sufficiency (DS) | A magician has K different cards each containing a distinct integer. T

A magician has K different cards each containing a distinct integer. The magician asks a participant to come on stage and chose n cards, where \(n<=K\). What is the probability that the cards chosen by the participant are in descending order or ascending order.

1. The magician has a set of 15 "K" cards in his hand
2. The participant choses 8 cards from the magician's hands.