Let an represents the number of bit strings of length n containing two – McqOptions

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1.	Let an represents the number of bit strings of length n containing two consecutive 1s. What is the recurrence relation for an?
A.	an-2 + an-1 + 2n-2
B.	an-2 + 2an-1+ 2n-2
C.	2an-2 + an-1 + 2n-2
D.	2an-2 + 2an-1 + 2n-2
Answer» B. an-2 + 2an-1+ 2n-2

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