If a and b are independent events with p(a) = .5 and p(b) = .2, find the following: a) p(a u b)b) p(a^c ? b^c)c) p(a^c u b^c)**note a^c or b^c refers to a complement or b complement**

If A and B are independent, then .

a.

b. I'm guessing the ? is supposed to stand for intersection. We can use DeMorgan's law for complements here:

c. DeMorgan's law can be used here too:

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11