Suppose that 8% of a certain batch of calculators have a defective case, 11% have

defective batteries, and 3% have both of these problems. Construct the probability distribution
table (categories are defective case/non-defective case, and defective batteries/non-defective
batteries). Find the probability that a calculator has
(a) A defective case or defective batteries.
(b) A defective case and good batteries.
(c) Defective batteries, given the case is good.
(d) Is having a defective case independent from having defective batteries?

3 answers

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85%

a.0.19
b.0.05
c.0.08
d.0.08