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Given the scores 4 7 8 11 13 8 with correspondi... - JAMB Mathematics 2001 Question

Given the scores: 4, 7, 8, 11, 13, 8 with corresponding frequencies: 3, 5, 2, 7, 2, 1 respectively. The mean score is
A
7.0
B
8.7
C
9.5
D
11.0
correct option: b

Mean = ∑fx/∑f

Mean = (4x3) + (7x5) + ... + (8x1) all divided by 20

Mean = 174/20 = 8.7

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