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Gaterde · Answer 1 · 2021-05-26T09:39:00+0000

Answer:

$\large\boxed{\large\boxed{10/21}}$

Step-by-step explanation:

There are only two mutually exclusive possibilities for each complex electronic system: being defective or being not defective:

Number of complex electronic systems: 7
Nmber of defective systems: 2
Number of not defective systems: 5

Probability that no defective systems are found in the sample is the equal to the probability of selecting them consecutively without replacement and finding each one is not defective:

Porbability the first is not defective × probability the second is not defective

5/7 × 4/6 = 20/42 = 10/21

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