Homework Help: MATH: PROBABILITIES

Posted by Janel on Saturday, April 24, 2010 at 11:22pm.

You ask a neighbor to water a sickly plant while you are on vacation. Without water the plant will die with probability 0.85. With water it will die with probability 0.55. You are 89 % certain the neighbor will remember to water the plant.
You come back from the vacation and the plant is dead. What is the probability the neighbor forgot to water it?

MATH: PROBABILITIES - Maddison, Sunday, April 25, 2010 at 12:22am
Well....

I am not %100 percent sure, but I think I have got the right answer.

100-89%=11%

Then, 85% of 11% is 9% (rounded)

So I would say 9%
MATH: PROBABILITIES - Reiny, Sunday, April 25, 2010 at 9:12am
Does this question come form a section in your course called Markov's chains?

if so, then set up a transition matrix with 2 columns called Die, Live and
two rows called water, no water
that would be
.85 .15
.55 .45

multiply that by
.11 .89 -- did water is last number

to get

.58 .417

so there is a 58% chance your neighbour forgot to water.
MATH: PROBABILITIES - Anonymous, Wednesday, April 27, 2011 at 12:13am
both of you are wrong...
MATH: PROBABILITIES - Anonymous, Wednesday, April 27, 2011 at 12:14am
both of you are wrong...
MATH: PROBABILITIES - Anonymous, Saturday, May 28, 2011 at 12:31pm
any one know the answer:(?
MATH: PROBABILITIES - Lex, Thursday, February 23, 2012 at 8:37pm
You need to use the rule of BAYES and the theorem of total probability.

Answer this Question

Related Questions

MATH: PROBABILITIES - You ask a neighbor to water a sickly plant while you are ...
PROBABILITIES - You ask a neighbor to water a sickly plant while you are on ...
statistics - You ask a neighbor to water a sickly plant while you are on ...
statistics - You ask a neighbor to water a sickly plant while you are on ...
5th Grade Science - What do all desert plants have in common? A. all have ...
science - I have to design a sustainable city with a river running through it. ...
College Math - Water rises inside a plant's stem an average of 4ft. every ...
physics - Water drops over 49 m high Niagara Falls at the rate of 6.0 106 kg/s. ...
science - A class is to perform an experiment to study the effects of various ...
physics - Water drops over 49 m high Niagara Falls at the rate of 6.0 106 kg/s. ...

For Further Reading

First Name:
School Subject:
Answer: