Question 5. Recall that the ISBN code encodes the nine-digit number = 10 then X1... x9 as x₁ ... 10, where x10 = Σixi( mod 11). (If x10 it is encoded as the digit X.)

Computer Networking: A Top-Down Approach (7th Edition)
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ISBN:9780133594140
Author:James Kurose, Keith Ross
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Chapter1: Computer Networks And The Internet
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I need to solve the following: "ii) Suppose a book has the ISBN number 0444x50090, where the digit represented by x has been lost in transmission. What is x?"

I know that for encoding there's a formula one can use but I'm confused about how to use it with the x?

Question 5. Recall that the ISBN code encodes the nine-digit number
= 10 then
X₁...X9 as X₁...X10, where x10 = Σ₁ix;( mod 11). (If x10
it is encoded as the digit X.)
Transcribed Image Text:Question 5. Recall that the ISBN code encodes the nine-digit number = 10 then X₁...X9 as X₁...X10, where x10 = Σ₁ix;( mod 11). (If x10 it is encoded as the digit X.)
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