I am not aware of any OOTB rule / function. 

You can check below post to use JS function. 

https://stackoverflow.com/questions/4959975/generate-random-number-between-two-numbers-in-javascript

Hi

Pega has an OOTB function random(double,double) which returns the value between two values.

Regards

Bhavya

Hi Anudeep,

PFB link which might be helpful for this requirement.

https://community1.pega.com/community/pega-support/question/generating-random-numbers

Hi Anudeep B,

There is a OOTB Function Normal of "Random" library.  The function will return a double value in between the mentioned two values. However if you would need a number between those two values, you can do a rounding as below.

Hope this helps.

Regards,

Priyabharathi