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\(\begin{array}{c|c} Weight(s) & 0 -10 & 10 - 20 & 20 - 30 &30 -...

Mathematics
JAMB 1993

\(\begin{array}{c|c} Weight(s) & 0 -10 & 10 - 20 & 20 - 30 &30 - 40 & 40 - 50\\ \hline \text{Number of coconuts} & 10 & 27 & 19 & 6 & 2\end{array}\)

Weight(g) 0-10 10-20 20-30 30-40 40-50
No. of coconuts 10 27 19 6 2

Estimate the mode of the frequency distribution above

  • A. 13.2g
  • B. 15.0g
  • C. 16.8g
  • D. 17.5g
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Correct Answer: Option C
Explanation

Mode = a + \(\frac{(b - a)(F_m - F_b)}{2F_m - F_a - F_b}\)

= \(L_1 + \frac{\Delta_1 x^\text{c}}{\Delta_1 + \Delta_2}\)

= \(10 + \frac{(20 - 10)(27 - 10)}{2(27) - 10 - 19}\)

= 10 + \(\frac{170}{25}\)

= 10 + 6.8

= 16.8


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