Refer to Table 11.13 in Exercise 11.87 that gives probabilities for fruit fly lifetimes. Table 11.13 (a)

Question:

Refer to Table 11.13 in Exercise 11.87 that gives probabilities for fruit fly lifetimes.

Table 11.13

4 p(x) 0.30 0.20 0.15 0.10 0.05

(a) If we know a fruit fly died before the end of its second month, what is the probability it died in its first month?
(b) If a fruit fly makes it past its second month, what is the probability it will live more than four months?