A study conducted by a local university found that 25 percent of college freshmen support increased spending on environmental issues.

If 6 college freshmen are randomly selected, find the probability that exactly 3 support increased spending on environmental issues.

a. .0330

b. .1318

c. .7844

d. .9624

b. .1318

Step-by-step explanation:

For each freshmen, there are only two possible outcomes. Either they support increased spending on enviromental issues, or they do not. The probabiliy of each freshmen supporting increased spending on environmental issues is independent from each other. So we use the binomial probability distribution to solve this problem.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

In which is the number of different combinations of x objects from a set of n elements, given by the following formula.

And p is the probability of X happening.

In this problem we have that:

25 percent of college freshmen support increased spending on environmental issues. This means that

If 6 college freshmen are randomly selected, find the probability that exactly 3 support increased spending on environmental issues.

This is when . So

So the correct answer is:

b. .1318

c

step-by-step explanation:

it isn't d, because the interquartile range is from 27-57. and the interquartile range is basically half the data, it's pretty obvious.

it isn't b, because like i said earlier, the interquartile range is from 27-57. 57-27 is 30. the real range has to be longer

not a either. although it looks like it, 3/4 of the data is not greater than 27. but if c is wrong than this should be correct

the correct answer is c, because 13 is the point in which the plot starts

typically if you want , you would actually put questions here for us to you. but hey, that's just me. maybe someone will magically answer the questions for you without knowing what they are.