Total sequences: \(2^9 = 512\)
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- Yes, confirmed.
- So the answer is \(\boxed{1}\)
- An anthropologist records 9 distinct cultural practices in a village, each classified as either communal (C) or individual (I). How many sequences of classifications contain at least one pair of consecutive communal practices?
- Let \(b_n\) be the number of binary sequences of length \(n\) with no two consecutive C’s (C = communal).
- Same recurrence: \(b_n = b_{n-1} + b_{n-2}\)
- Base:
