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Mathematics 8 Online
OpenStudy (anonymous):

Fan + Medal

OpenStudy (anonymous):

OpenStudy (anonymous):

What is the probability that a person who is above 35 years old has a hemoglobin level of 9 or above?

OpenStudy (anonymous):

0.357 0.313 0.531 0.343 0.432

OpenStudy (anonymous):

to do it mathematically more information is needed

OpenStudy (anonymous):

That's literally all I have

OpenStudy (anonymous):

give us a sec...

hartnn (hartnn):

see the 'Above 35 years' column total is 162 and 2 out of 3 entries are 76,40 find the third entry first 76+40+x = 162

OpenStudy (anonymous):

So what do I do next bc that's not an option

hartnn (hartnn):

you need the probability more than 9 means x+40 and total is 429 so probability = (x+40)/429

OpenStudy (anonymous):

How do I get x?

hartnn (hartnn):

76+40+x = 162

hartnn (hartnn):

or 40+x = 162-76 probability = (162-76)/429

OpenStudy (anonymous):

x = 46

OpenStudy (anonymous):

0.200

hartnn (hartnn):

oops we are only considering person above 35 years of age so (162-76)/162

OpenStudy (anonymous):

0.530

hartnn (hartnn):

correct :)

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