Base rates for death of an 87 year old man are ~11%, in the US. The risk is probably lower for someone like the King of Saudi, with access to all possible medical interventions. https://www.ssa.gov/oact/STATS/table4c6.html

@JoshuaAnderson Fun fact, the King of Saudi Arabia is treated at UChicago Hospital, which is named for him I believe.

@JoshuaAnderson I may be wrong about it being named after him. But lots of Arabs come there when they have cancer.