Question: Let N be the r-dimensional random vector with the multinomial PMF given in Example 5.21 with n > r > 2: (a) What is the

Let N be the r-dimensional random vector with the multinomial PMF given in Example 5.21 with n > r > 2:
Let N be the r-dimensional random vector with the multinomial

(a) What is the joint PMF of N1 and N2?
(b) Let Ti = N1 + ... + Ni. What is the PMF of Ti?
(c) What is the joint PMF of T1 and T2?

72 1, nr

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