SOLUTION: A box contains 50 computer chips of which 8 are known to be bad. A chip is selected at random and tested. (a) What is the probability that it is bad? (b) If a test on the first

Question 916566: A box contains 50 computer chips of which 8 are known to be bad. A chip
is selected at random and tested.
(a) What is the probability that it is bad?
(b) If a test on the first chip shows that it is bad, what is the probability that
a second chip selected at random will also be bad, assuming the tested
chip is not put back into the box?
(c) If the first chip tests good, what is the probability that a second chip
selected at random will be bad, assuming the tested chip is not put
back into the box?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
50 Chips, 8 bad, 42 good
a. one drawn..P(bad) = 8/50 = 4/25
b. Second drawn- first not replaced....P(bad| 1st bad) = 7/49 = 1/7
c. Second drawn- first not replaced...P(bad|1st good) = 8/49
RELATED QUESTIONS
A box contains 25 transistors, of which 4 are known to be bad. A transistor is selected... (answered by stanbon)

A hat contains three chips: one red, one blue and one green. Two chips are to be selected (answered by rfer)

A bag contains five red chips, three white chips, and two blue chips. Three chips are to... (answered by ewatrrr)

A box contains two red chips and three white chips. Let X denote the number of draws... (answered by jrfrunner)

a box has 2 red chips, 2 blue chips. and 1 green chip. 2 chips are randomly selected... (answered by chiggypiggy)

1. Two chips are chosen at random from a box containing 8 blue, 4 green, and 2 orange... (answered by ewatrrr)

Bowl A contains 4 red chips and 6 green chips. Bowl B contains 7 red chips and 3 green... (answered by greenestamps)

I have a couple questions here that I do not understand how to do. Can someone please... (answered by stanbon)

A hat contains three chips: one red, one blue and one green. Two chips are to be selected (answered by edjones)