Do you have any investments right now? How might you invest in the future?

 I have a great love for books. I always try to save money to buy books. I understand the value of books, for me, the investment I put in books is worth it. Now I have enough savings to buy the books I like. In the future, I hope to be able to use my precious books as a tool to help young people in particular and society in general. Therefore, I intend to use that "book" investment to build a library for poor children who want to read books, they can read books for free. Although I won't bring in a large sum of money, it makes me happy.

85.560%

step-by-step explanation:

conditional probability is defined as:

p(a|b) = p(a∩b) / p(b)

in other words, the probability that a occurs, given that b has occurred = the probability that both a and b occur / the probability that b occurs.

in this example:

p(turns 64 | turns 44) = p(turns 64 & turns 44) / p(turns 44).

if someone turns 64, they must have already turned 44, so:

p(turns 64 | turns 44) = p(turns 64) / p(turns 44)

on page 42, we see that of the original 100,000, 94944 turn 44, and 81234 turn 64.   therefore:

p(turns 64 | turns 44) = 81234 / 94944

p(turns 64 | turns 44) = 0.85560