An examination consists of three parts. In part A, a student must answer 2 of 3 questions

An examination consists of three parts. In part A, a student must answer 2 of 3 questions

An examination consists of three parts. In part A, a student must answer 2 of 3 questions. In part B, a student must answer 6 of 8 questions and in part C, a student must answer all questions. How many choices of questions does the student have?

Answer：3C2 × 8C6 × 1 = 84 : Use of fundamental theorem of counting