click Add-Ins on the Tools menu, and click to select the Analysis ToolPak check box.

If the Analysis ToolPak is not available in the Add-Ins dialog box, you may need to run the Setup program and reinstall the add-ins.(you will probably need your Microsoft Office CD-ROM for this)
or click Browse and locate the drive, folder name, and file name for the Analysis ToolPak add-in, Analys32.xll - this is usually located in the Microsoft Office\Office\Library\Analysis folder

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