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I have a probability question as below. There is an epidemic where K out of every...

I have a probability question as below.

There is an epidemic where K out of every 100 people in community enfected. and L out of every 100 people has been tested randomly.We also know that the test gives erroneous result 1 out of every 20 times.If the infection rate is found to be 10% after some testing, what is the rate of actual infections?How does your estimate depend on K and L?

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