Examlex
The following sample of code contains errors. Rewrite the incorrect statements to correct all errors.
-Private Sub btnDisplay_Click(ByVal sender As Object,ByVal e As System.EventArgs)Handles btnDisplay.Click
' display the contents of the students.txt file
' declare variables
Dim inFile As IO.StreamWriter
Dim strStudent As String
' clear previous students from the Students box
lblStudents.Text = String.Empty
' determine whether the file exists
If IO.Exists("students.txt")= True Then
' open the file for input
inFile = IO.File.ReadText("students.txt")
' process loop instructions until end of file
Do Until inFile.Peek <> -1
' read a student line
strStudent = inFile.ReadLine
' display the student
lblStudents.Text = lblStudents.Text &
strStudent & ControlChars.NewLine
Loop
' close the file
Me.Close()
Else
MessageBox.Show("File not found","Students",
MessageBoxButtons.OK,
MessageBoxIcon.Information)
End If
End Sub
Total Revenue
The overall amount of money generated by a firm from selling its goods or services, calculated as the quantity sold multiplied by the price of the goods.
Average Revenue
The amount of income generated per unit of sales or product sold, calculated by dividing total revenue by the number of units sold.
Competitive Firm
A business entity in a market where numerous sellers compete to sell their goods or services, implying no single seller controls the market prices.
Downward Sloping Demand
The economic principle that, all else being equal, demand for a good or service decreases as its price increases.
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