Suppose that 80% of books are classified as fiction. Two books are chosen at random. What is the probability that both books ara fiction?

Ithink it's dissoulution

Which of the following is an example of an opposing signal? no examplthates given.   i would say, that traffic lights in a city at major intersections direct the flow of traffic in opposite directions so would be an example.also, stop signs on either side of the same street would be an example. at a train crossing, the light for allowing car traffic in opposite directions or not would be another example.