Probabilities from a siblings table
Probabilities from a siblings table
Secondary 2
4 marks
TGM Original Questions
Each object in the stated selection population is equally likely to be selected.
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
- has no siblings,[1]
- has at least 3 siblings,[2]
- does not have exactly 2 siblings.[1]
Solution:
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Answer:(i) \(\frac{1}{4}\) (ii) \(\frac{5}{24}\) (iii) \(\frac{5}{6}\).
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