[Feature] Add mean functionality in Arithmetic Progression Calculator

[bhumii-ka]

Description

Currently the Arithmetic Progression Calculator calculates nth term and sum of n terms I want to add one more feature such that it calculates arithmetic mean of n terms as well.

Screenshots

No response

Checklist

• [X] I have checked the existing issues.
• [X] I follow Contributing Guidelines of this project.
• [X] I am a GSSOC'24 contributor.
• [ ] I am a IWOC'24 contributor.
• [ ] I am a JWOC'24 contributor.
• [ ] I am a SWOC'24 contributor.

Code of Conduct

• [X] I agree to follow this project's "Code of Conduct".

[github-actions[bot]]

Hey @bhumii-ka, Welcome to the project CalcDiverse! 🎊 Thanks for opening an issue! 🙌 Please wait for the issue to be assigned. Happy Coding!! ✨

[Rakesh9100]

Go ahead @bhumii-ka

[github-actions[bot]]

Hello @bhumii-ka! Your issue #1770 has been closed. Thank you for your contribution!! 🙌