WAEC Mathematics 2015 Objective — Question 10
Question 10 of 50 from the West African Examinations Council (WAEC) Mathematics 2015 Objective paper, with the correct answer and a full explanation.
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If m=4, n=9 and r=16, evaluate m/n − 1(7/9) + n/r
- A. 1(5/16)
- B. 1(1/16)
- C. 5/16
- D. -37/48Correct
Explanation
Substituting: 4/9 − 1(7/9) + 9/16 = 4/9−16/9+9/16 = −12/9+9/16 = (−192+81)/144 = −111/144 = −37/48.
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