will the laptop work with two modules of ram 1R*8 and 2r*8

Hello Srikar97,

Thank you for you post!

My apology to ask you this but could you please re-post your question to our "Laptop" community page?

There are many laptop expert in this community, I believe you'll reply back soon.    

https://www.dell.com/community/Laptops/ct-p/Laptops

Best,

Naomi

Could you please post the exact model of your system? In general the 2 RAM modules should work but it depends on the model and the specs. The following link has more information on the meaning of single and dual rank RAM.

https://superuser.com/questions/989572/what-does-the-1rx8-mean-vs-2rx8-for-ram-and-are-they-compatible