The tree diagram shows the sample space of two-digit numbers that can be created using the digits 2,1, 8, and 9. What is the probability of choosing a number from the sample space that contains 1 or 9? Click the icon to view the tree diagram. P(1 or 9) = or % possible outcomes, which are There are possible outcomes that include 1 or 9. There are equally likely (Type integers, fractions, or mixed numbers.) ​