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JAMB Mathematics 2014 Question 49

Question 49

Probability

Numbers: 1, 2, 3, 4, 5, 6
Frequency: 18, 22, 20, 16, 10, 14
The table above represents the outcome of throwing a die 100 times. What is the probability of obtaining at least a 4?

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

Answer: D (2/5)

Explanation

'At least 4' means 4, 5 or 6: 16 + 10 + 14 = 40 times out of 100. Probability = 40/100 = 2/5.