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(AB) 
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 
