You can put this solution on YOUR website! How do you solve this question:How many bitstrings of length 8 either tart with a 1 or end with a 00?
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8 bits --> 256 numbers
1/2 of them start with 1 = 128.
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1/4 of them (64) end with 00 and 1/2 of those start with 0 = 32
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128 + 32 = 160