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JAMB Mathematics 1992 Question 50

Question 50

Permutation and Combination

A student has five courses to take from Mathematics and Physics. There are 4 courses in Mathematics and 3 in Physics which he can choose from at will. In how many ways can he choose his courses such that he takes exactly two courses in Physics.

  1. A.11
  2. B.12
  3. C.10
  4. D.7
Show the answer and explanation

Answer: B (12)

Explanation

He chooses 2 of the 3 Physics courses (3 ways) and the other 3 courses from the 4 Mathematics courses (4 ways). 3 × 4 = 12.