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avanturin [10]
3 years ago
7

Help please no rush

Mathematics
1 answer:
s2008m [1.1K]3 years ago
6 0
To solve this, we take the number of subjects who weren't diabetic, and then divide them by the total number of subjects who took the test:

Probability = \frac{28}{3+28}
                   = \frac{28}{31}
                   = 0.903225..
                   = 0.90 (rounded)
-------------------------------------------------------------------------------------------------------------
Answer:

So the probability of randomly selecting a subject who was not diabetic would be <u></u>0.90 (the final option)

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<em>Note:
</em>         <em>We only used the numbers under 'Negative Test', because the question wanted the probability 'given that the test result was negative'</em>
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