A tree diagram in math is a tool that helps calculate the number of possible outcomes of a problem and cites those potential outcomes in an organized way.

Probability Trees: Theory The basic idea of a probability tree is to use the properties of probability to make a branching diagram of different outcomes.

A discrete distribution is a statistical probability distribution that represents the possible discrete values a variable can take.

Question A bag contains 4 blue counters and 3 red counters. A box contains 5 blue counters and 2 red counters. Complete the tree diagram and work out the probability of selecting two red counters.