How many strings of four letters are there that contain at least one repeated letter? 264 264 - 26³ 26 x 25 x 24 x 23 O264 (26 x 25 x 24 × 23) O(26 x 25 x 24 × 23) - (4 × 26) -

Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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How many strings of four letters are there that contain at least one repeated letter?
264
264 26³
-
26 x 25 x 24 x 23
264 (26 × 25 × 24 × 23)
O (26 x 25 x 24 x 23) - (4 × 26)
-
Transcribed Image Text:How many strings of four letters are there that contain at least one repeated letter? 264 264 26³ - 26 x 25 x 24 x 23 264 (26 × 25 × 24 × 23) O (26 x 25 x 24 x 23) - (4 × 26) -
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