Multiple choice

A question has two parts, Part A and Part B, each containing 8 questions. If the students have to choose 6 from part A and 5 questions from Part B, in how many ways can he choose the questions?

  1. 255

  2. 1568

  3. 728

  4. 1558

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Part A has 8 questions, student chooses 6: C(8,6) = 28 ways. Part B has 8 questions, student chooses 5: C(8,5) = 56 ways. Since selections from Part A and Part B are independent, total ways = 28 × 56 = 1568. The claimed answer is correct.

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