Use the table to answer the question.
Plant Types A B C D E
Number of Seedlings 100 140 80 60 40
A farmer conducted an inventory on his two square kilometers of rainforest; the results are in the table. He plans on randomly selecting a seedling to experiment on when he goes back to the forest. What is the probability that he will randomly pick a type B plant? Write your answer in the simplest form of a fraction.
The total number of seedlings is 100+140+80+60+40=420.
The number of type B seedlings is 140.
The probability of picking a type B plant is 140/420 = 1/3.
Therefore, the answer is 1/3.