Electronic baseball games manufactured by Tempco Electronics are shipped in lots of 24. Before shipping, a quality-control inspector randomly selects a sample of 8 from each lot for testing. If the sample contains any defective games, the entire lot is rejected. What is the probability that a lot containing exactly 3 defective games will still be shipped?

Question

anonymous · Answer

the probability that the first one chosen is not defective is $\frac{21}{24}$

anonymous · Answer

the probability that the second one is not defective given that the first one is not, is $\frac{20}{23}$

anonymous · Answer

and finally the probability that the third one is not defective, given that the first two are not, is $\frac{19}{22}$

anonymous · Answer

multiply these together for your answer

anonymous · Answer

1.126???

anonymous · Answer

rounded three decimals places

anonymous · Answer

oh shoot did that wrong

anonymous · Answer

0.657

anonymous · Answer

?

anonymous · Answer

This seems wrong. Eight tests are run, and some of the later ones might find a defective.