Answered! Option Explicit Option Base 1 Sub finalproject() ' Decleration of variables Dim x, u, l, i, j, n, b As Integer…

Your code with little modification which is boldened

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Option Explicit

Option Base 1
Public Sub finalproject()
‘ Decleration of variables
Dim x, u, l, i, j, n, b As Integer
Dim frec1, frec2, frec3, frec4, frec5, frec6, frec7, frec8, frec9, frec10 As Integer
Dim g As String
Dim r() As Integer
‘ initial values input
x = Cells(4, 4)
ReDim r(x) As Integer
u = Cells(5, 4)
l = Cells(6, 4)
g = “_”

‘ finding the number of raws
n = Int(x / 7 + 1)

‘ calculating bucket size
b = Int((u – l) / 10)
‘ Generating random number and assigning them to cells
Do
For j = 1 To 7
r(x) = Int((u – l + 1) * Rnd + l)
Cells(i + 12, j + 2) = r(x)
If Cells(i + 12, j + 2) <= l + b Then
frec1 = frec1 + 1
Cells(12, 16) = frec1
End If
If Cells(i + 12, j + 2) <= l + (2 * b) Then
frec2 = frec2 + 1
Cells(13, 16) = Abs(frec2 – frec1)
End If
If Cells(i + 12, j + 2) <= l + (3 * b) Then
frec3 = frec3 + 1
Cells(14, 16) = Abs(frec3 – frec2)
End If
If Cells(i + 12, j + 2) <= l + (4 * b) Then
frec4 = frec4 + 1
Cells(15, 16) = Abs(frec4 – frec3)
End If
If Cells(i + 12, j + 2) <= l + (5 * b) Then
frec5 = frec5 + 1
Cells(16, 16) = Abs(frec5 – frec4)
End If
If Cells(i + 12, j + 2) <= l + (6 * b) Then
frec6 = frec6 + 1
Cells(17, 16) = Abs(frec6 – frec5)
End If
If Cells(i + 12, j + 2) <= l + (7 * b) Then
frec7 = frec7 + 1
Cells(18, 16) = Abs(frec7 – frec6)
End If
If Cells(i + 12, j + 2) <= l + (8 * b) Then
frec8 = frec8 + 1
Cells(19, 16) = Abs(frec8 – frec7)
End If
If Cells(i + 12, j + 2) <= l + (9 * b) Then
frec9 = frec9 + 1
Cells(20, 16) = Abs(frec9 – frec8)
End If
If Cells(i + 12, j + 2) <= l + (10 * b) Then
frec10 = frec10 + 1
Cells(21, 16) = Abs(frec10 – frec9)
End If
x = x – 1
If x = 0 Then Exit Do
Next j
i = i + 1
Loop Until n = i

‘ computing buckets and assigning them to thier cells
For i = 1 To 10
Cells(i + 11, 13) = i
Cells(i + 11, 14) = l + (i * b)
Next i
‘ determining class range for each bucket
For i = 1 To 10
Cells(11 + i, 15) = l & g & (l + b)
l = l + b + 1
Next i
‘ assigning array values to cells on the spread sheet

For x = 1 To UBound(r)
Cells(x, 20) = r(x)
Next x

End Sub

Private Sub CommandButton1_Click()
finalproject
End Sub

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Expla:

For x = 1 To UBound(r)
Cells(x, 20) = r(x)
Next x

Yor code was for x=1 to x ,Before this code value of x is 0 , and when x=1 it 1st iteration , The The loop runs x times i,e 1 time. and it prints r(1)

But we have to print all values of r(). So we loop must iterates n (number of elements in array) times . SO to number of elements in array use Ubound(r).

Note: you must provide values in the cell D$,D5,D6 and the values of r90 is shown in T column

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output