Given an integer n ≥ 1, how many strings of n letters of the English alphabet (26 letters) begin and end with the same letter? O26-26(26-1) None of these. 26-1 26-2 O O 26-1-28-2
Given an integer n ≥ 1, how many strings of n letters of the English alphabet (26 letters) begin and end with the same letter? O26-26(26-1) None of these. 26-1 26-2 O O 26-1-28-2
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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To find how many string of n letters of the English alphabet begin and end with same letters .
Total number of English alphabet is 26 .
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