What is the probability the thrid bottles she chooses will be grape juice?

Question

there are 3 types of juice in  the refrigerator: apple, orange, and grape. There are 4 bottles of each type of juice. Ivy is going to choose 3 bottles of juice at random.

 

Part A : If the first two bottles Ivy chooses include 1 apple juice and 1 orange juice

 

 

Answer 1

Hi Travina,

 

This problem is just like the other two.  After removing 1 apple juice and 1 orange juice, there are 10 total bottles of juice left in the fridge, 3 apple, 3 orange, and 4 grape.  The probability that the next bottle that Ivy chooses will be grape is:

 

P = (Number of grape juice bottles left) / (Total number of juice bottles left)

 

You may have to reduce the fraction.  Let me know what you get and I'll tell you if you are right.

Answer 2

first and 2nd draw : 1 apple juice and 1 orange juice.

   

 3rd draw from: ( 3 apples ,  3 orange, 4 grapes)

 

            probability of Grape juice on 3rd draw: = 4/ 10 = 2/5