How many bit strings of length eight either start with the bit 1 or end with the two bits 00 ?

Published On :2021-02-03 19:09:00

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      1 _ _ _ _ _ _ _

 or  _ _ _ _ _ _ 0 0


begin{array}{l} Rightarrow {2^7} + {2^6} - {2^5}\\ Rightarrow 160 end{array}