Question

a poll shows that 76% of voters in a city favor an initiative to increase spending on public schools. if 10 voters are selected at random, wht is the probability that exactly five of them will vote in favor of the initiative?,

Answer 1

Lesson 8: Binomial Distributions

1. a. 91%

2. a. 5.1%

3. c. s^5-25s^4v+250s^3v^2-1250s^2v^3+3125sv^4-3125v^5

4. d. 55.8%

Answer 2

5.1% This is Binomial with n=10 and p=0.76 P(X = 5) = 10C5 (0.76^5) (1-0.76)^5 = 0.0509