Question: Student 2 comes to class with probability 1.0 if student 1 does. Student 3 ignores them. A small class has only three students. Each comes

Student 2 comes to class with probability 1.0 if student 1 does. Student 3 ignores them.
A small class has only three students. Each comes to class with probability 0.9. Find the probability that all the students come to class and the probability that no students come to class in the above circumstances.

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