Aband has 7 new songs and wants to put 5 of them on a demo cd. how many different arrangements of 5 songs are possible?

2520 arrangements

Step-by-step explanation:

There are 7 songs.

There are 5 songs in the demo CD.

You have a choice of any of the 7 songs for the first song.

Then you are left with 6 choices for the second song.

After that, you have 5 choices for the third song.

And it goes on.

Number of arrangements

= 7 x 6 x 5 x 4 x 3

= 2520

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! )

ans789

step-by-step explanation: