Question No 30:
In an internal audit of 200 invoices, the following numbers of errors were discovered:
Number of Errors Number of Invoices
0 60
1 30
2 40
3 40
4 20
5 10
6 or morew 0
The expected value of the number of errors per invoice is
A. 1∙8
B. 2
C. 2∙1
D. 3
Answer: A
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