=MinColA(A2:E7)
Function MinColA(rng As Range) As Integer
Dim rngRow As Range
Dim intMin As Integer, intCompteur As Integer
For Each rngRow In rng.Rows
intMin = Application.WorksheetFunction.Min(rngRow)
If intMin = rngRow.Cells(1).Value Then intCompteur = intCompteur + 1
Next rngRow
MinColA = intCompteur
End Function