Just found out friend has head and neck cancer so what is outcome?

Depends. Outcomes in head and neck cancer depend on the overall stage of the cancer. Staging is dependent on tumor size, lymph nodes involved, if the tumor has spread, and other factors.
Not able to predict. Cancer of head and neck is usually squamous cell carcinoma and can have survival rates in the 90% range for stage i cancers and can be incurable for stage IV cancers with distant metastasis. Overall cure rates are generally in the 60 - 70 % range for all people.
It depends on stage. It can vary from excellent to poor. Neeed more info about stage and location.