A candy store sells a brand of nuts that costs $2 per pound and a brand of chocolate coated candies that costs $0.50 per pound. Select the equation that solves for x lb of nuts that must be mixed with 35 lb of the
chocolate coated candies in order to have a mixture that costs 1.49 per pound.

Step-by-step explanation:

The nuts cost $2 per pound

Chocolate coated candies costs $0.5 per pound.

We know that we want x lb of nuts mixed with 35lb of chocolate coated candies in order to have a mixture that costs $1.49 per pound.

We must write the equation in terms of $ per pounds.

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! )