Question 1144875: What is the check digit (d) for the UPC bar code number 5-11320-36217-d?
A. 0
B. 7
C. 8
D. 9
Is D correct?
The question and the answer choices in the link here: https://prnt.sc/p48q0g
Answer by math_helper(2461)   (Show Source):
You can put this solution on YOUR website!
I also got 9
I followed the procedure outlined on Wikipedia (add odd digits, multiply by 3, then add even digits, take result mod 10, if this value is nonzero, subtract from 10, otherwise use 0):
Details:
5+1+2+3+2+7 = 20
20 * 3 = 60
60 + (1+3+0+6+1) = 71
71 mod 10 = 1 ---> nonzero so check bit is 10-1 = 9
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