Answer:
.
Step-by-step explanation:
Given ,The bag contains :
9 chocolate chip cookies, 5 peanut butter cookies, 9 sugar cookies and 7 oatmeal raisin cookies.
Total cookies = 9+5+9+7=30
Now , the number of ways to choose any two cookies ( one after another) :

The number of way to choose two oatmeal raisins ( one after another) :

Now , the probability that Skyler randomly selects an oatmeal raisin cookie from the bag, eats it, then randomly selects another oatmeal raisin cookie will be :

Hence, the required probability is
.