How can I solve the following question by indicating the step and logic involved: 10 children and 4 schools are present in a locality. If children are put into school in random, what is the probability that each school has at least 1 child?
A test consists of 15 multiple choice questions with 4 alternatives (1 point for each) and 5 true or false questions (1/4 point for each). Assuming the student guesses on all questions, what are the probabilities that he will get 8.5 points and 10.25 in this test?