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The graph shows the cumulative frequency of the... - JAMB Mathematics 2001 Question

The graph shows the cumulative frequency of the distribution of masses of fertilizer for 48 workers in one institution. Which of the following gives the inter-quartile range?
A
\(\frac{1}{2}(Q_3 - Q_1)\)
B
Q3 - Q2
C
Q3 - Q2
D
Q3 - Q1
correct option: a
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