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JAMB Mathematics 1998 Question 50

Question 50

Probability

If x, y can take values from the set {1, 2, 3, 4}, find the probability that the product of x and y is not greater than 6.

  1. A.5/8
  2. B.5/16
  3. C.1/2
  4. D.7/8
Show the answer and explanation

Answer: A (5/8)

Explanation

There are 4 × 4 = 16 pairs. Products ≤ 6: with x = 1 four pairs, x = 2 three, x = 3 two, x = 4 one, 10 in all. So 10/16 = 5/8.