Suppose we have two modules in serial call them $M_1,M_2$ , a signal passing from $M_1$ to $M_2$ has probability of error $\epsilon_1$ , and at $M_2$ has $\epsilon_2$ probability of error.
In serial what is the final error probability of the signal?
What about in parallel?
What are the correct terminology to google this topic under?
PS : This is not a homework question as it would have been at least 20 years too late. :)
Thank you in advance