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Triss [41]
3 years ago
5

2 points

Mathematics
1 answer:
Stels [109]3 years ago
3 0

Answer:

C

Step-by-step explanation:

You have to multiply

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The correct answer is B) 18%

Step-by-step explanation:

Note that the vaccine is already and is 80% effective. This means that if the entire population was administered with the vaccine, only 8/10 would gain immunity leaving 2/10 or 0.2 exposed.

If the new vaccine, therefore, is supposed to be 90% effective, it is only pragmatic to administer it against those who do not have immunity which is 0.2 of the existing population.

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3 years ago
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Answer:

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Step-by-step explanation:

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