Explanation:

Each new Workbook created in Excel has Three worksheets by default.
In Microsoft Excel, a workbook is a collection of one or more spreadsheets, also called worksheets, in a single file. Below is an example of a spreadsheet called "Sheet1" in an Excel workbook file called "Book1." Our example also has the "Sheet2" and "Sheet3" sheet tabs, which are also part of the same workbook.