Suppose a 10digit phone number is transmitted by a cellular

Suppose a 10-digit phone number is transmitted by a cellular phone using fourbinary symbols for each digit. Let C denote thenumber of bits sent correctly, D the num-ber of deletions, and E the number of er-rors. Find P[ C = c,D = d,E = e ] for all c , d , and e .

problem 2.4.3 from Probability and Stochastic Proccess 3rd edtion

Solution