What is the average age to which a 90-year old man will live, given that the probability a person age x will die before age x+1 is (x - 89) / 5? A. 91 B. 91.5 C. 92 D. 92.5 E. 93 Thanks!
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Originally Posted by feiyingx What is the average age to which a 90-year old man will live, given that the probability a person age x will die before age x+1 is (x - 89) / 5? A. 91 B. 91.5 C. 92 D. 92.5 E. 93 Thanks! (4/5)x91+(4/5)(3/5)x92+(4/5)(3/5)(2/5)x93+(4/5)(3/5)(2/5)(1/5)x94 92.4896 ~92.5
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