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fredd [130]
3 years ago
5

In a certain town, 22% of voters favor a given ballot measure. For groups of 21 voters, find the variance for the number who fav

or the measure.
Mathematics
1 answer:
raketka [301]3 years ago
4 0

c. 4.6

       

21 X .22= 4.6

       

Calculating the variance requires finding the product of 21 and 22%. To make this easier we convert 22% into it's decimal form and construct the equation. To back check this answer we can use 10% of 21 voters which equals 2.1% then double that amount to reach 4.2%, knowing that we now have a close approximation of the variance we can eliminate answers a, b, and d, leaving c as the only logical choice.

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