statistics and probability.

Problem 2: An instructor who taught two sections of engineering statistics last term1 the rst with 20 students and the second with 30 decided to assign a term project. After all projects were turned in, the instructor ordered them before grading. Consider the rst 15 graded projects. In 1What is the probability that exactly 10 of these are from the second section? (I point) t 1What is the probability that atleast 10 of these are from the second section? [2 points) 1- What is the probability that atleast 10 of these are from the same section? (2 points) 1- What are the mean value and standard deviation of the number among these 15 that are from the second section? {I point)