If 8% of the population of trees are elm trees, find the probability that in a sample of 100 trees, there are exactly 6 elm tree

The object would have to be spherical, orbit the sun, and be traveling in a path with other objects.

It depends on the subject for me. some exams are easier than others so i usually go through it and answer questions i know based on my general knowledge, then double check after. going through the lesson can a lot  because the exams can be  very lesson-specific, but sometimes they are ridiculously long so a lot of people don't take the time. i did find that, when i went through the lessons, i was making 100's on my exams vs strictly using + the internet and  i make 90's. 

Ithink the answer is d.