SOLUTION: Please help me solve these questions. James, Thomas and Mark work in a post office. Their job is to pull items from shelves and assemble them for subsequent verification and packa

Algebra ->  Probability-and-statistics -> SOLUTION: Please help me solve these questions. James, Thomas and Mark work in a post office. Their job is to pull items from shelves and assemble them for subsequent verification and packa      Log On


   

Question 855793: Please help me solve these questions.
James, Thomas and Mark work in a post office. Their job is to pull items from shelves and assemble them for subsequent verification and packaging. James makes a mistake in an order one time in a hundred. Thomas makes a mistake in an order five times in a hundred and Mark fills respectively 30, 40 and 30 percent of all the orders.
a) What is the probability that a mistake will be made in an order?
b) What is the probability that if a mistake is made in an order, the order was filled by James?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

IF You meant that Mark makes no mistakes

	errors	fills	% of total E

J	0.01	0.30	0.003

T	0.05	0.40	0.02

M	0	0.30	0

			0.023

a) .023

b) .003