A bucket contains stones and seashells. There are 40 seashells in the bucket and the ratio of stones to seashells is 7: 4. Find the number of stones in the bucket.

There are 70 stones in the bucket.

Step-by-step explanation:

If there are 40 seashells in the bucket and the ratio of stones to seashells is 7:4, then there are 70 stones, because  4 x 10 = 40, and 7 x 10 = 70

Hope this helps!

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! )

the answer would be 150 books

step-by-step explanation:

if you divide 300 by 2 you will get 150