passpadi

2013

Mathematics

JAMB

Find the mean of t + 2, 2t - 4, 3t + 2 and 2t.

A.

t + 1

B.

2t

C.

2t + 1

D.

t

Correct Answer: 2t

Explanation

∑x = (t + 2) + (2t + 4) + (3t + 2) + 2t = 8t N = 4 ∴ Mean, x = ∑xN=8t4=2t = 2t

∑x = (t + 2) + (2t + 4) + (3t + 2) + 2t = 8t N = 4 ∴ Mean, x = ∑xN=8t4=2t = 2t
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