Rolling Dice with Auto-counting

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/*** Rolling Dice ********************************
Betty used her dice-rolling program to investigate how often
matches occur when rolling 3 dice.  But it wasn't clear whether
matches or non-matches appear more often.  She wrote a program
to roll the dice 1000 times and automatically count the matches.
**************************************************/

Counting Loop

This program uses a loop to roll 3 dice 1000 times.  Each time, it automatically decides whether there was a MATCH
in the 3 dice or not.  If a MATCH occurs, it automatically adds 1 to MATCHES, which is a "running total" of the
number of times a match occurred.  At the end it divides by 1000 to give the fraction of times that a match occurred.
Since the result is below 0.5, it means that a person betting on this game should bet AGAINST a match, rather than
betting for a match.

Practice

• Download the program and run it
• Change the program so that it rolls 4 dice instead of 3.  Then change the if.. command so that it correctly
  checks for a match in the 4 dice - the command must be considerably longer.  Then find out whether
  MATCHES or non-matches are more likely with 4 dice.
• Change the program to calculate the total of the 4 dice - e.g.  4+3+1+6 = 14 .
  Count how often the total is above 15.
• Change the program to count how often a 6 occurs - that means any of the dice could be 6.
  Find out whether it is more likely that a 6 appears or that no 6 appears.
• Find out how often it happens that all 4 dice are the same.