There are 4 machine and it is known that exactly 2 of them are faulty.they are tested one by one in a random order
till both the faulty machine are identified.. Then the probability that only 2 tested are needed, is
plz explain using tree Diagram.
I have made the complete tree but left out some probabilities so you can practice completing the answers.
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei