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WAEC Further Mathematics 2007 Question 26

Question 26

Probability

The table shows the marks obtained by two pupils in a test.
Marks: 5 − 7, 8 − 10, 11 − 13, 14 − 16, 17 − 19, 20 − 22
Freq.: 4, 7, 26, 41, 14, 8
Find the probability that a pupil selected at random had a mark of at least 14.

  1. A.0.22
  2. B.0.41
  3. C.0.49
  4. D.0.63
Show the answer and explanation

Answer: D (0.63)

Explanation

Marks of 14 or more: 41 + 14 + 8 = 63 out of 100, so the probability is 0.63.