Two unknown measurement frequencies
Two unknown measurement frequencies
Secondary 2
6 marks
TGM Original Questions
Core stretch
Masses 2.5, 2.6, 2.7, 2.8, 2.9 kg have frequencies \(4,p,6,q,2\). There are 20 masses and their mean is 2.7 kg.
- Form two equations and solve for \(p,q\).[4]
- State the mode(s) and median.[2]
Solution:
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Answer:(a) \(p+q=8,\ 26p+28q=220\), so \(p=2,q=6\). (b) Modes 2.7 kg and 2.8 kg; median 2.7 kg.
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