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JAMB Mathematics 2015 Objective — Question 9

Question 9 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2015 Objective paper, with the correct answer and a full explanation.

The mean of 2−t, 4+t, 3−2t, 2+t and t−1 is

A. t
B. −2
C. 2Correct
D. −t

Explanation

Sum = 10 (the t terms cancel). Mean = 10/5 = 2.

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