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The model height and range of heights 1 35 1 25... - JAMB Mathematics 2005 Question

The model height and range of heights 1.35, 1.25, 1.35, 1.40, 1.35, 1.50, 1.35, 1.50, and 1.20 are m and r respectively. Find m+2r.

A
1.35
B
1.65
C
1.95
D
3.00
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Correct Option: C

1.35, 1.25, 1.35, 1.40, 1.35, 1.50, 1.35, 1.50, and 1.20

Modal height = 1.35

Range (r) = 1.50 - 1.20

= 0.30

∴m + 2r = 1.35 + 2(0.30)

= 1.35 + 0.60

= 1.95

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