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StatisticsQ&A Libraryusan asks her neighbor to water a sickly plant while she is on vacation.Without water, the plant has a 0.8 probability of dying. With water, theplant has a 0.15 probability of dying. Suppose she is 90% certain thather neighbor will remember to water the plant. What is the probabilitythat the plant will be alive when she returns?Question

Asked Apr 2, 2019

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Hello. Can I get help on how to calculate this question? If there is also a way to use the TI-83 graphing calculator, it would be helpful! Thank You!

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Step 1

**Conditional probability of two events:**

The conditional probability is the probability of one event given that the other event has already occurred.

Consider two events *A* and *B*, the conditional probability of the event *A* given that *B* has occurred is obtained as follows:

Step 2

**Obtain the probability that the plant will be alive when Usan arrives:**

The probability that neighbour remember to water the plant is *P*(Watered) = 0.9.

The probability that neighbour forgets to water the plant is *P*(Not watered) = 0.1.

The probability that the plant dies without water is *P*(plant died | N...

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