Given M dice, show that the number of ways of observing N1 ones, N2 twos, etc. is given by the formula: M! W(Mr N1! N2! ' ' N6) = N1! N2! ..... N5! Ml Hint: Consider a product of binomial expressions m (MN)! N2 twos from N - N1 dice, N3 threes from N - N1 - N2 dice, etc. Also, Box 7.45 in the text is helpful. for N1 ones from M dice