The number of different ways of assigning 10 marks to 3 questions is

What is the number of ways in which an examiner can assign 10 marks to 4 questions, giving not less than 2 marks to any question ?

The number of ways in which an examiner can assign 40 marks to 6 questions, giving not less than 3 marks to any question, is

Find the number of ways in which an examiner can assign 30 marks to 10 questions in a question paper. (fractional marks are not allowed)