Question

The probability that a person living in a certain city owns a dog is estimated to be 0.3. Find the probability that the tenth person randomly interviewed in that city is the fifth one to own a dog

Answer 1

${?}^{?}$
$hello \times \frac{?}{?}$

Answer 2

Hey buddy here is some logic !!

Now its a simple calculation. The probabilty of the tenth person having a dog is just 0.3. The first part is calculated using the number of ways of picking 4 people out of 9 etc. Its been a while I did those formulas (nCr and all), but if you are currently doing it, you may know. 

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