Can you help me draw the tree diagram and association calculations please.
A firm has two photocopying
machines. The old one is available for use 80% of
the time and the new one 90% of the time. The machine availabilities are
independent of one another.
a. Construct a tree diagram to display the above information.
b. Determine the probability that at a randomly selected time:
i. both machines are available, ii neither machine is available
iii. exactly one machine is available, iv. at least one machine is available