Question

Using the table, what is the approximate probability of a 21-year-old female being alive in the next year? Hint: Use the complementary rule.

Answer 1

The probability that a 21 year old female died in 1997 was $\dfrac{45.5}{100000}=0.000455=0.0455\%$. This means the chance of a 21 year old female being alive in 1998 (based on 1997 data) would be $1-0.000455=(100-0.0455)\%=99.9545\%$.