Problem Statement  
One Saturday evening you are playing a game of online Scrabble. Your opponent is a very good player, but this time you managed to win. After a brief conversation, you are told: "I am clearly better than you, but one game is simply not enough to prove it." Your opponent then makess the following bet: "If we play 10 games, you will win less than 5 ... and this will happen every time, even if we try this 10 times in a row!".
You will solve a more general problem using the following parameters:  an int trials denoting the number of meetings in which a set of games is played.  an int games denoting the number of games that are to be played in each meeting.  an int winsNeeded denoting the number of victories you need in one of the meetings to win the bet.  an int winChance denoting the probability in percent of winning one particular game. Return a double between 0 and 1, denoting the probability you have to win the bet.  
Definition  
 
Notes  
  Your return value must have an absolute or relative error less than 1e9.  
Constraints  
  trials will be between 1 and 50, inclusive.  
  games will be between 1 and 20, inclusive.  
  winsNeeded will be between 1 and games, inclusive.  
  winChance will be between 0 and 100, inclusive.  
Examples  
0)  
 
1)  
 
2)  
 
3)  
 
4)  
 
5)  
 
6)  
