Question

How many bit strings of length 8 either with two bits 00?​

Answer 1

Answer:

Number of bit strings of length 8 that end with 00: 26 = 64. Number of bit strings of length 8 that start with 1 and end with 00: 25 = 32. Applying the subtraction rule, the number is 128 + 64 − 32 = 160.