Answer:
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.
So to get the percentage that will develop immunity, we have:
0.2 x 0.9 = 0.18 or 18%
Cheers!
Answer: 12.83
Explanation:
The mean is the average of a data set. So, in order to find the mean, we have to add all he values and in this case, we got 77. Then we divide 77 by he number of values we have, which results in 12.83. Therefore, the mean of these numbers are 12.83.
Greatest common factor is 1
Note
- GCF stands for Greatest common factor
Answer:
df
Step-by-step explanation:
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The unknown digit is 7 because 6.471 is greater than 6.470 and less than 6.48.
