1
11. if 225 of the students in your
school attend the basketball game,
45% of the students attended. how
many total students are in your
school?

500 students

Step-by-step explanation:

First, we must figure out how many students equal 1%. To do this, we divide 225 by 45.

225/45 = 5 students

So, 1% of the school = 5 students. Now, we need to find 100% of the students. To do this, we take 5 x 100.

5 x 100 = 500, so there are 500 students total in the school.

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! )