20 rob is asked to simplify the expression below. 10x – 2(4x + 6y) + 3y he states that the simplified expression is 2x + 15y because using the distributive property yields 10x – 8x + 12y + 3y, and then combining like terms yields 2x + 15y. explain the error in rob's reasoning. write the correct simplified expression for 10x – 2(4x + 6y) + 3y.

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! )

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step-by-step explanation: