There are 6 brown, 5 blue, and 2 orange marbles in a hat. what is the probability of picking two orange marbles in a row without returning the marbles back to the hat? (write your answer as a fraction.)

Lets look at the information we have-

6 brown marbles
5 blue marbles 
2 orange marbles. 

Question:- 
What is the probability of picking two orange marbles in a row without returning the marbles back to the hat?
Solve:-

First add all the marbles:-

6 + 5 + 2 = 13

13 marbles in total. 

Now lets write the 1st probability:- 

2 orange
13 together


2nd probability:- 

13 - 1 = 12

1 orange (left)
12 total (without putting back)


Hope i helped ya!! xD