Respuesta :
If you know there are exactly two defective switches and you have already selected one of them of 8 total, then there is one left out of 7 remaining.
The probability that the second one is defective, given that the first one is defective will be 1/14.
What is probability?
Its basic premise is that something will almost certainly happen. The percentage of favorable events to the total number of occurrences.
A circuit to run a model railroad has 8 switches. two are defective.
If a person selects 2 switches at random and tests them.
Then the probability that the second one is defective, given that the first one is defective.
Then the total event will be
Total event = ⁸C₂ = 28
Then the probability will be
P = 2 x 1 / 28
P = 1 / 14
More about the probability link is given below.
https://brainly.com/question/795909
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