Subject: Question
Name: ayman
Who are you: Student

coffee machine may be defective since it dispenses the wrong amount of coffee (C) & or the wrong amount of suger ( S ) the probability of these defects are
P(C) = 0.05, P(S) = 0.04 & P( C&S ) = 0.01
find
1- what proportion of cups of coffee have at least one defect
2- what proportion of cups of coffee have no defect

Ayman,

If a cup of coffee have at least one defect then it either has the wrong amount of coffee or the wrong amount of sugar as so will need to use the expression for
P(C or S).

Penny