can someone tell me if my answers to these probability problem is right?

*posting

Question

can someone tell me if my answers to these probability  problem is right? 

*posting

math2400 · Answer

What is the probability that a given child has either malaria or sickle-cell? 0.596
What is the probability that a child has malaria given that the child has the sickle-cell trait?  0.066
What is the probability that a child has malaria given that the child doesn’t have sickle-cell? 0.346
True of False: "The events sickle-cell trait and malaria are not independent because knowing the sickle-cell status changes the probability of malaria." FALSE

math2400 · Answer

And i believe ven. diagram 4 is right

amistre64 · Answer

venn 4 is correct, but how do we work the questions?

amistre64 · Answer

none of the answers to your questions appear to be good ... havent considered the true false yet

amistre64 · Answer

what is the basic solution to determining a probability?

amistre64 · Answer

.... and i do believe this question is messed up.

amistre64 · Answer

In all:  25% had sickle cell
         34.6% had malaria
         6.6% had both.

it is generally regarded that the 6.6% is included both cases.  but that is not how the venns have been constructed

amistre64 · Answer

otherwise this looks like it is meant to read as:

In all:  25% had ONLY sickle cell
         34.6% had ONLY malaria
         6.6% had both.

math2400 · Answer

so would it be a different ven diagram? like ven diagram 2?

math2400 · Answer

@amistre64

amistre64 · Answer

no, the options for venns, 3 and 4 are drawn correctly, but only 4 adds up to 100%

amistre64 · Answer

the problem is in HOW they presented the information.

math2400 · Answer

this is my instructors power point but it's not that useful https://eee.uci.edu/15f/37740/documents/stat8f15_04-ch9-10.pdf

math2400 · Answer

so then are the rest of my answers correct then?

amistre64 · Answer

spose we have 5 kids, 

2 have only red balloons, and 3 have red balloons and green balloons.

in all, how many kids have red balloons?

in all, how many kids have ONLY red balloons?

math2400 · Answer

5 red 
and only 2 with only red balloons

amistre64 · Answer

so the information should be stating that 25% of the kids have sickle cell .... this would include those with both diseases as well, right?

amistre64 · Answer

venn4 assumes the information  is stating "ONLY" 

but venn3 is not filled in correctly, at least not in a way that is not vague and amibiguous.

amistre64 · Answer

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