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3 years ago

15

The vote count for candidate A was 7,310. The vote count for candidate B was 14,190. Only two candidates were running. what was

the percent of the voters voted for candidate A?

1 answer:

irinina [24]3 years ago

4 0

7310/(14190+7310)

34%

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Answer:

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We are given the following distribution:

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Formula:

$E(x) = \displaystyle\sum x_iP(x_i)\\\\E(x) =0(0.3) + 1(0.5) + 2(0.2) + 3(0.4)\\\\E(x) = 2.1\\\\E(x^2) = \displaystyle\sum x_i^2P(x_i)\\\\E(x^2) =0(0.3) + 1(0.5) + 4(0.2) + 9(0.4)\\\\E(x^2) = 4.9\\\\Var(x) = E(x^2) - (E(x))^2 = 4.9-(2.1)^2 = 0.49\\\\\sigma(x) = \sqrt{Var(x)} =\sqrt{0.49} = 0.7$

Thus, the standard deviation of X is 0.7

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Answer:

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