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WAEC Mathematics 2010 Question 19

Question 19

Probability

The table shows the number of pets kept by 30 students in a class.
Number of pets: 0, 1, 2, 3, 4
Number of students: 8, 4, 5, 10, 3
If a student is picked at random from the class, what is the probability that he/she kept more than one pet?

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

Answer: C (3/5)

Explanation

Students with 2, 3 or 4 pets: 5 + 10 + 3 = 18. Probability = 18/30 = 3/5.