Question

In a certain town, 20 percent of voters are in favor of a given ballot measure and 80 percent are opposed. For groups of 120 voters, find the mean for the number who oppose the measure.

Answer 1

The mean for the number who oppose the measure is 96.

Explanation:

We are given the following information in the question:

Percentage of voters who are in favor of a given ballot measure = 20%

Percentage of voters who are against a given ballot measure = 80%

Number of voters in a group = 120

Formula:

`\text{Mean} = np\\\text{where n is the number of observations and p s the probability of sucess}`

In this case, n = 120 and p = probability of success = Percentage of voters who are against a given ballot measure = 80%

Mean =

`120* 80\% \\\\120* \displaystyle(80)/(100) = 96`

Hence, the mean for the number who oppose the measure is 96.

Answer 2

120 voters =100%
? 80%
120*80/100
=96 voters