# MATH

posted by .

The probability that a voting-age adult in 2004 voted in the presidential election was 0.57. Five voting-age adults in 2004 were randomly selected. Find the probability that exactly 2 or the 5 adults voted in the presidential election.

• MATH -

prob(voting) = .57
prob(not voting) = .43

prob(2 of 5 voted)
= C(5,2) (.57)^2 (.43)^3
= .2583

• MATH -

p=probability of voting
q=(1-p)=probability of not voting.

Out of 5 adults randomly selected, the probability that exactly 2 voted is calculated according to the binomial expansion,
C(5,2)p^2q^3
=(5!/(2!3!))*0.57^2*0.43^3
=0.258 (approx.)

## Similar Questions

1. ### math

Fifteen percent of the seniors voted for Joe. If 289 seniors voted for tehother candidates, how many seniors voted in the election?
2. ### Statistics

12% of voters in a recent election voted on the greens candidate, if 10 people were randomly selected what is the probability that exactly 4 people voted for the green candidate.
3. ### Math 1330

In a survey of 1000 eligible voters selected at random, it was found that 200 had a college degree. Additionally, it was found that 90% of those who had a college degree voted in the last presidential election, whereas 47% of the people …
4. ### math

The probability that a voting-age adult in 2004 voted in the presidential election was 0.57. Five voting-age adults in 2004 were randomly selected. Find the probability that exactly 2 or the 5 adults voted in the presidential election.
5. ### statistics

the probability that a voting-age adult in 2008 voted in the presidential election was .57. Five voting age adults in 2008 were randomly selected. Find the probability that exactly 2 of the 5 adults voted in the presidential election.
6. ### Statistics

In a survey of 1233 people, 917 people said they voted in a recent presidential election. Voting records showed that 72% of eligible voters actually did vote. Given that 72% of eligible voters actually did vote, find the probability …
7. ### MATH

IN LOCAL TOWNS 4/5 OF THE VOTING AGE POPULATION IS REGISTRED TO VOTE 11/16 OF REGISTRED VOTERS IN ELECTION FOR MAYOR WHAT FRACTION OF THE VOTING AGE POPATION VOTED.
8. ### us history

How did Floridians vote during the presidential election of 1860?
9. ### us history

ow did Floridians vote during the presidential election of 1860?
10. ### math (ms sue)

Suppose that one voter in the 2010 UK General Election was selected at random. The probability that the person voted for the Conservative Party was 0.36, the probability that the person voted for the Labour Party was 0.29, and the …

More Similar Questions