Answer:
The value is 
Step-by-step explanation:
From the question we are told that
The number of recognized colors is n = 12
The number of teams is k = 8
Generally the total number of color pairs available to be selected is mathematically represented as

Here C stands for combination
=> 
Generally the number of ways of selecting color pairs so that no two teams will have chosen the same pair of color is mathematically represented as


Here P stands for permutation

Generally the total number of way the teams can select a pair of color is mathematically represented as

=> 
=> 
Generally the the probability that no two teams will have chosen the same pair of color is mathematically represented as

=> 