Probabilities from a siblings table

Probabilities from a siblings table

Secondary 2
TGM Original Questions

A survey of 72 students gives: 0 siblings: 18; 1: 27; 2: 12; 3: 7; 4: 5; at least 5: 3. Find the probability that a selected student

  1. has no siblings,
  2. has at least 3 siblings,
  3. does not have exactly 2 siblings.

Solution:

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Answer:(i) \(1/4\); (ii) \(5/24\); (iii) \(5/6\).

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