What Is The Life Expectancy In A Person With Heart Stroke?

I have a friend who had a stroke. The Dr s went in and took a massive clot from her brian. It seems like she is giving up.Not eating,and not talking.But her sister will ask her a question.And she will nod her head.But her sisters tells her she didn t understand the nod.And then she will say a word.Like yes,No,And I promise.Shes 64 yrs old. What are her chances of coming out of this.Its been a month.