To answer this we need to find the probability that teesha is not chosen for each pick, then multiply them together.
For the first pick, there are 19 students in the class, so teesha has a 18/19 chance of not getting chosen. For the second pick, one student has been removed, so there is now only a 17/18 chance Teesha is not chosen.
We now multiply the two probabilities together. 18/19 * 17/18 = 306/342
