Let a n denote the number of all n -digit positive integers formed by the digits 0, 1 or…
Mathematics · JEE Advanced · NTA Exams — Permutations and Combinations
Let an denote the number of all n-digit positive integers formed by the digits 0, 1 or both such that no consecutive digits in them are 0 . Let
bn = the number of such n-digit integers ending with digit 1 and
cn = the number of such n-digit integers ending with digit 0 .
The value of b6 is
bn = the number of such n-digit integers ending with digit 1 and
cn = the number of such n-digit integers ending with digit 0 .
The value of b6 is
- 7
- 8
- 9
- 11
Answer
(B) 8
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