Sandals are on sale for 30% off. The original price of one pair of sandals is $30 What is the new cost of sandals after the discount?

$21

Step-by-step explanation:

Original price of sandal = $30

Discount = 30%

What is the new cost of sandals after the discount?

Amount of discount = discount × original price

= 30% × $30

= 30 / 100 × 30

= 9

Amount of discount = $9

New price of sandal = Old price - amount of discount

= $30 - $9

= $21

New price of sandal = $21

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! )