Suppose a computer chip manufacturer rejects 4% of the chips produced because they fail presale testing.How many chips should they expect to test before finding a bad one?
A)1.04
B)4
C)25
D)0.04
E)0.96

Question

Quizplus · Accepted Answer

To find the expected number of chips tested before finding a bad one, we need to use the formula:
Expected value = 1/probability of event 
Here, the probability of testing a bad chip is 0.04 (since 4% are rejected), so the probability of testing a good chip is 0.96. 
Therefore, the expected number of chips tested before finding a bad one is:
1/0.04 = 25. 
Hence, the best choice is C.

Suppose a Computer Chip Manufacturer Rejects 4% of the Chips