However, in your query seems to be a typo or corrupted file extension (possibly .rar or related to a compressed file). If you meant a specific .rar file or answer key from a known curriculum, I don't have direct access to proprietary or password-protected files.

If the worksheet involves multiple steps, ensure you are following PEMDAS .

For those specifically looking for a "Worksheet Key Rarl," please be cautious. The term "Rarl" often indicates a compressed file (RAR) which may be associated with unofficial downloads or academic shortcut sites. It is generally safer to solve the problems using the basic probability formula :