After os x reinstall numbers, pages, keynote is not installed
My friend was using this mac book and he gave it to me. I reinstalled os x, and after reinstall i can not find numbers, pages, keynote apps. I created apple support profile and added this mac to my profile by entering serial no. but numbers, pages and keynote are not available on my macbook. What can i do to install those apps?
MacBook Air (13-inch, Early 2015), OS X El Capitan (10.11.5)