Type A Type B Total Batch 1 30 15 45 Batch 2 20 40 60 Batch 3 20 25 45 Total 70 80 150 The table shows the batch number and type of item for 150 items. If an item from batch 2 is selected at random, what is the probability that the item is type A? 20 40 20 60 20 70 20 150

20/70 i think ;)

Step-by-step explanation:

becuaswew if u ad the 20, 20 , 30 it equals 70 wich is the denominator

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! )

his first public project he is asked to create a small scale drawing. the garden is a right triangle with base 25m and height 30m. are you trying to solve for the last side/hypotenuse? the irrational form of the answer would be 5\sqrt{61}