I am stuck on question number (3) below: ¾ of the population in
Siniestra is left-handed and ¼ are right-handed. In an
examination, it was shown that 80% of the left-handed passed and
90% of the right-handed passed. 1)Complete the tree diagram 2)
Find the probability of i) the people are left handed and they
passed ii) all passed. 3) A person was chosen at random from the
population. He had passed the examination. Using the answers you
provided in Question number 2. Find the probability that i) the
person chosen from the population is left handed.