Touching ball mathematics
Take two balls at random. According to the combination principle, there are (14! )/[(2! )*( 12! ) ]=9 1 species; Among them, the red situation is (4! )/((2! )*(2! )) =6 kinds; Red and white have 4 *10 = 40; In vain (10! )/[(2! )*(8! )]=45; So the probability is 6/9 1, 40/9 1, 45/9 1.