Originally Posted by

**ballin_sensation** Ms. Bayes has a dog named Dorrie. If Ms. Bayes feeds Dorrie before going

to bed, Dorrie wakes Ms. Bayes before 5 a.m. only 10% of the the time. If Ms.

Bayes forgets to feed Dorrie before going to be bed, Dorrie wakes Ms. Bayes

before 5 a.m. 80% of the time. Ms. Bayes forgets to feed Dorrie one day in twenty.

If you hear Ms. Bayes complaining that Dorrie woke her before 5 a.m., what is

the probability that she forgot to feed Dorrie the previous evening?

Thanks for the help!