JAMB Mathematics 2008 Objective — Question 50
Question 50 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2008 Objective paper, with the correct answer and a full explanation.
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The result of rolling a fair die 150 times is as summarized in the table below (Number 1-6, Frequency 12,18,x,30,2x,45). What is the probability of obtaining a 5?
- A. 15/150Correct
- B. 18/150
- C. 30/150
- D. 45/150
Explanation
From the table: 12+18+x+30+2x+45=150. 3x+105=150. 3x=45. x=15. So the frequency for obtaining a 5 is 15, giving a probability of 15/150.
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