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Question
A manufacturer tested 7000 LED lights at random and found that 25 of them were defective. If a LED light is selected at random, what is the probability that the selected LED light is a defective one
Solution
Sample space n(S) = 7000
Let E1 be the event of getting selected LED light is a defective one
n(E1) = 25
p(E1) = `("n"("E"_1))/("n"("S"))`
= `25/7000`
= `1/280`
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