Question 5
A student has to answer 10 questions, choosing at least 4 from each of Parts A and B. If there are 6 questions in Part A and 7 in Part B, in how many ways can the student choose 10 questions?
**Editorial note for this self-study exercise:** Questions are distinct; count each chosen set once, regardless of answering order.
**Editorial note for this self-study exercise:** Questions are distinct; count each chosen set once, regardless of answering order.