Question

what is the file extention name of an excel work book?
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Answer 1

Answer:

.xlsx

Explanation:

Answer 2

Answer:

The file's extension name is 'xlxs'

Explanation:

Office Open XML (OOXML) format was introduced with Microsoft Office 2007 and became the default format of Microsoft Excel ever since. Excel-related file extensions of this format include: .xlsx – Excel workbook. .xlsm – Excel macro-enabled workbook; same as xlsx but may contain macros and scripts.