| In probability
theory, the multiplication rule states that:

There is a 0.01 (1%) probability
that a seal will fail if the joint is not
coated with a sealing compound before assembly.
The proportion of joints that are not coated
is 0.05 (5%).
What is the probability that
a seal will fail.
| P(A|B) |
Probability that the seal will fail
if not coated |
0.01 |
| P(B) |
Probability the seal will not be coated |
0.05 |
 |
0.01 x 0.05 |
=0.0005 |
|