 | Thomas Simpson - 1742 - 148 pages
...331 perfons living of 36 years of age, only 93 of them arrive to the age of 66 : therefore, feeing the whole number of perfons living at the beginning...the number remaining alive at the end of it, in the ratio of 331 to 93 ; the number of chances that a perfon of 36 years of age has to live 30 years longer,... | |
 | William Gordon (of the Academy, Glasgow.) - 1770 - 494 pages
...of 294 perfons living of 40 years of age, no more than 69 arrive at the age of 70; therefore fince the whole number of perfons living at the beginning...the number remaining alive at the end of it, in the ratio of 294 to 69; the number of chances that a perfon of 40 years hath to live 30 years longer, will... | |
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... the whole number of perfons living at the beginning of this term, is to the number remaining alive at the end of it, in the ratio of... 