By default how many worksheets are available in "workbook" (Excel)?

NCERT (2026-27 edition):
Basic Concepts of Spreadsheet – “… A file in Excel is known as a “Workbook”. A workbook is a collection of a number of “Worksheets” (Figure 2.2). By default, three sheets, namely Sheet 1, Sheet 2, and Sheet 3 are available to users.”