Dependent probability

The first instance of  is under the Probability and statistics Math Mission. This exercise practices the multiplication rule for probability with dependent events.

Types of Problems
There are two types of problems in this exercise:


 * 1) Select from a group: In this problem a situation is described where people or marbles are being selected from a collection. The student finds the probability of a particular event and enters it in the box provided.Depprob1.png
 * 2) Conditions met: This problem describes a situation with multiple outcomes and another situation based on those outcomes. The student is expected to answer the probability in the box provided.Depprob2.png

Strategies
This exercise is medium to get accuracy badges because conditional probability can be subtle. With a picture, they are not terrible though. Speed badges are medium because the techniques can be mechanical once you get into the problem types and see the same things occurring even in different situations.


 * 1) Drawing a picture can help in both problems to better visualize what is going on.
 * 2) Don't forget, when you remove an object from a group the denominator will always change (and the numerator may or may not).
 * 3) For Conditions met a tree diagram can be extraordinarily helpful (but time consuming).