1. ©G Dear2010 – Not to be sold/Free to use
General Mathematic
(HSC)
Applications
of Probability
Two Way
Tables
Stage 6 - Year 12
Press Ctrl-A
©G Dear2010 – Not to be sold/Free to use

2. Two Way Tables Tables that shows the results of an experiment. 9 3 12
200 students are tested for polio.
* 12 have a positive result, 9 were diagnosed correctly.
* 188 had a negative result, 8 were diagnosed incorrectly.
Test Results
Accurate
Inaccurate
Total
Positive Result 9 3 12
Negative Result
180 8
188
Total
189 11
200 9 12 3 4
P( Accurate Positive Result) = =
188
200 9 25
P( Negative Result) = =