Find the lower quartile of the distribution illustrated by the cumulative frequency curve

  • A 17.5
  • B 19.0
  • C 27.5
  • D 28.0
waec 2016mathematics

The correct answer is B. 19.0

Lower quartile,

Q1 = \(\frac{1}{4}\)Nth term

= \(\frac{1}{4}\) x 600th term

= 150th term

= 15.5 + 3 + 0.5

= 19

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