Given the following table of events
Good Poor Total
A 63 27 90
Not A 32 78 110
Total 95 105 200
P(N) = ?
P(P & N) =?
Solution. From the above table, there are 200 in total and 110 are NOT A. So,
The solution uses the table of events to calculate P(N), P(P&N) and P(P|N).