Say you have 6 apples and 7 oranges. You put them in a bag, and pull one out. The odds of taking an apple is 6/13. Now imagine that you randomly take one fruit out of the bag, but you don't look at it. You then take out a second piece of fruit. What are the chance that the second fruit is an orange?
+1252 Let's say the first fruit is an apple
This is a 6/13 possibility
And the probability of an orange is 7/12
6/13*7/12 = 7/26
And if the first fruit is an orange
7/13 possibility
Probability of an oragne is 1/2
7/13*1/2 = 7/26
Total probabgility = 7/26+7/26 = 14/26 = 7/13
