Leaf lengths and category probabilities

Leaf lengths and category probabilities

Secondary 2
TGM Original Questions

Thirty leaf lengths, in cm, are 5,8,12,14,17,21,24,29,31,35,7,9,13,15,18,22,25,30,33,38,6,10,12,16,19,23,27,28,32,36.

  1. Construct a stem-and-leaf diagram.
  2. A leaf is long if it exceeds 28 cm and short if it is below 14 cm. Find
    1. long : short,
    2. the probability that a selected leaf is neither long nor short.

Solution:

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Answer:(a) correct ordered stem-and-leaf, key \(2|1=21\) cm; (b)(i) \(8:9\); (ii) \(13/30\).

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