joshjoshjosh
New member
- Joined
- Mar 17, 2019
- Messages
- 4
Hi guys. I was stuck on this question and would like to get some help from the forum! The question is:
You ask your neighbour to water 3 sickly plants in your front yard while you are on vacation. Each of the plants will be alive with probability 0.9 if watered; it will be alive with probability 0.3 if not watered. You are 95 per cent certain that your neighbour will remember to water your plants.
Let X be the number of sickly plants that you will find to be alive when you return from your vacation.
(a) What is the probability P(X=2)
(b) If only one plant is found to be alive when you return, what is the conditional probability that your neighbour remembered to water the plants?
You ask your neighbour to water 3 sickly plants in your front yard while you are on vacation. Each of the plants will be alive with probability 0.9 if watered; it will be alive with probability 0.3 if not watered. You are 95 per cent certain that your neighbour will remember to water your plants.
Let X be the number of sickly plants that you will find to be alive when you return from your vacation.
(a) What is the probability P(X=2)
(b) If only one plant is found to be alive when you return, what is the conditional probability that your neighbour remembered to water the plants?