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# Maths probability question need help watch

1. Hey guys, pls could someone help me with this question...

In a population of rabbits, 1% are know to have a particular disease. A test is developed for the disease that gives a positive result for a rabbit that does have the disease in 99% of cases. It is also known that the test gives a positive result for a rabbit that does not have the disease in 0.1% of cases. A rabbit is chosen at random from the population.

(a) Find the probability that the rabbit rests positive for the disease
(b)Given that the rabbit tests positive for the disease, show that the probability that the rabbit does not have the disease is less than 10%.
2. (Original post by betapro)
Hey guys, pls could someone help me with this question...

In a population of rabbits, 1% are know to have a particular disease. A test is developed for the disease that gives a positive result for a rabbit that does have the disease in 99% of cases. It is also known that the test gives a positive result for a rabbit that does not have the disease in 0.1% of cases. A rabbit is chosen at random from the population.

(a) Find the probability that the rabbit rests positive for the disease
(b)Given that the rabbit tests positive for the disease, show that the probability that the rabbit does not have the disease is less than 10%.
I would suggest a tree diagram
3. (Original post by TenOfThem)
I would suggest a tree diagram
K thanks, ill try, what about b then?? :d
4. (Original post by betapro)
K thanks, ill try, what about b then?? :d
That is conditional probability
5. (Original post by TenOfThem)
That is conditional probability
Could you help with that one?
6. (Original post by betapro)
Could you help with that one?
Sure ... Have you done the tree diagram
7. (Original post by TenOfThem)
Sure ... Have you done the tree diagram
Ye
8. So how many on your tree diagram test positive

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