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Paha777 [63]
3 years ago
7

How many ternary strings of length 2 n are there in which the zeroes appear only in odd-numbered positions?

Physics
1 answer:
Rashid [163]3 years ago
8 0

In a string of length 2n, there are exactly n odd-numbered posiitons. In the remaning n even-numbered positions, we want to choose from only two possible digits, either a 1 or a 2. This means there are 2^n such ternary strings.

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