Mathematics, 16.04.2020 01:01 adswadsaasdads

Suppose that in a certain county 37% of voters are registered as Democrats, 29% as Republicans, 7% as Green party, and the rest are considered Independents. You conduct a poll by calling registered voters in the county at random. What is the probability that the first call will be to either a Democrat or a Republican?

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Answer from: izzyisawesome5232

0.66

Step-by-step explanation:

GIVEN: Suppose that in a certain county $37\%$ of voters are registered as Democrats, $29\%$ as Republicans, $7\%$ as Green party, and the rest are considered Independents. You conduct a poll by calling registered voters in the county at random.

TO FIND: Probability that the first call will be to either a Democrat or a Republican.

SOLUTION:

Lets total population of county be 100x .

voters registered as Democrats $=37\%=\frac{37}{100}\times100x$

=37x

voters registered as Republicans $=29\%=\frac{29}{100}\times100x$

=29x

voters registered as Green party $=7\%=\frac{7}{100}\times100x$

=7x

Probability that first call will be to Democrats $P(A)=\frac{\text{total democrats}}{\text{total voters}}$

$=\frac{37x}{100x}=0.37$

Probability that first call will be to Republican $P(B)=\frac{\text{total republicans}}{\text{total voters}}$

$=\frac{29x}{100x}=0.29$

probability that the first call will be to either a Democrat or a Republican

=P(A)+P(B)

=0.37+0.29

=0.66

Hence the probability that the first call will be to either a Democrat or a Republican is 0.66

Answer from: Quest

the 4th choice is the correct one

step-by-step explanation:

*sigh* i seriously need on this question. i don't understand it. i would appreciate it if somebody

Answer from: Quest

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction: this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology: the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion: the last is the discussion, this can be either by management people or persons who are all interested , etc.

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Suppose that in a certain county 37% of voters are registered as Democrats, 29% as Republicans, 7% a...