WAEC Mathematics 1996 Question 50

Question 50

Probability

The table gives the distribution of outcomes obtained when a die was rolled 100 times.
No. of die: 1, 2, 3, 4, 5, 6
Frequency: 18, 14, 20, 16, 15, 17
What is the experimental probability that it shows at most 4 when rolled again?

  1. A.8/25
  2. B.12/25
  3. C.13/25
  4. D.2/3
  5. E.17/25.
Show the answer and explanation

Answer: E (17/25.)

Explanation

'At most 4' means 1, 2, 3 or 4: 18 + 14 + 20 + 16 = 68 times out of 100. Probability = 68/100 = 17/25.