A rural village has 3500 residents. In a random sample of 225 residents, 4 have the flu. Predict roughly the number of residents in the village who have the flu.

62

Step-by-step explanation:

A rural village has 3500 residents and in a random sample of 225 residents, 4 of the residents have the flu. This means 4/225 has the flu

To predict the number of residents in the village who have the flu will be 4/225 multiplied by the total residents. This will be:

= 4/225 ×3500

= 14000/225

= 62.22

About 62 residents have the flu

the answer   is 200

step-by-step explanation:

this is a problem about poisson probabilities.   i don't know if you've

already studied poisson distributions, or if you have a place to look

to read more about the subject.  

here's how you can see a poisson distribution coming.   when there are

a lot of events that may happen at any time (or any place), and when

you're counting how many of them happen at a particular time (or a

particular place), and each event is independent of the others, then

the result is a poisson distribution.   this is roughly true for the

chocolate chips; one chip being in a cookie has only a small effect on

the probability that another chip will be in the cookie.

once you know you have a poisson distribution, you know a lot.   there

is only one parameter to a poisson distribution, so if you know the

mean, you know everything.   the form of the distribution is

  probability of n chips = {[e^(-x)]*(x^n)} / (n! )

a = 3.14

b = 18

c = 18/5 or 3.6 or 3 3/5

step-by-step explanation: