Computingtheaveragelongevityofpeoplecurrently50-years-old

A. includesallpeopleborninthatparticularyear50-years-ago.
B. resultsinthesameestimateoflongevityasthatcalculatedfrombirth.
C. doesnotincludeanyonewhowasborninthesameyearbutdiedbeforeage50.
D. isnotmathematicallypossible.


Answer: C

Sociology

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