A First Course in Probability (10th Edition)
10th Edition
ISBN: 9780134753119
Author: Sheldon Ross
Publisher: PEARSON
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This is a practice problem I need help with.
Watching all these drones buzz back and forth is giving you eyestrain. But you can’t just count every single drone -how could you ever know that you had caught them all? You instead take the following approach: you build a taser-net that you can use to stun and catch drones (much more fun than just watching), before tagging them and re-releasing them into the wild. Working for a week, you manage to tag 400 drones, releasing them back into the wild. After waiting a week, you start catching drones again.Catching another 400 drones, you find that 270 of the drones you’ve caught are tagged, meaning you’d caught them before. 130 of your new catch are untagged, meaning this is the first time that you’ve caught them. Assume drones were equally likely to be caught at all times. Before catching the second batch of drones, there were400 tagged drones in the wild, the rest were untagged.
1) After catching the second batch of drones, what is the smallest number of drones N that might be in the wild,in total?
2) What was the
3) What was the
4) What number of drones N makes your second batch results as likely as possible?
5) Assuming again that the probability that N=nis proportional to the probability of catching these second batch results with n total drones in the air, find again the smallest n max so that P(N ≤ n max) = 0.95.
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Hi, as per company policy, we'll answer the first 3 subparts. Kindly repost the question and specify that you need help with 4 and 5.
Given:
400 drones were caught, tagged and released in the first week.
In the second week, when 400 drones were caught, 270 were found to be tagged and 130 were untagged.
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