A batch of cookie dough will be sliced up into 100 cookies and then baked. 400 raisins have been included in the batch of dough, and the dough has been thoroughly mixed so as to randomize the ingredients. What is the chance that, despite these precautions, one or more cookies in the batch will contain no raisins at all?

a. How many raisins should be put in the batch of dough to be 99% sure that no cookie comes out with no raisins in it?

if there is gonna be 100 cookies an 400 raisins in the batch there should be a 1% chance that no 1 or more cookie will come out with out raisins.  You have more raisins than the number of cookies which if u ever bake cookies when adding in things like that you should add in as much raisin as there is cookie.

Step-by-step explanation:

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value