Answer:
B. 1-third
Explanation:
The formula for probability = Number of favorable outcomes/ Total number of outcomes
From the question, we are told that:
Owen knows he only has three pencils in his backpack, and they are all yellow. Hence, total number of outcomes = 3
He reaches into his backpack without looking and takes out a pencil.
Hence, total number of favorable outcomes = 1
What is the probability that the pencil was yellow?
Probability ( That the pencil is yellow) =
Number of favorable outcomes/ Total number of outcomes
= 1/3
Therefore, the probability that the pencil was yellow is 1/3 or one - thirds