Electronic baseball games manufactured by Tempco Electronics are shipped in lots of 20. Before shipping, a quality-control inspector randomly selects a sample of 7 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 2 defective games will still be shipped? (Round your answer to three decimal places.)

Question

kropot72 · Answer

$$P(0\ defective\ out\ of\ sample\ of\ 7)=\frac{18C7}{20C7}=\frac{13\times12}{20\times19}=you\ can\ calculate$$