Two unknown frequencies from total and median
Two unknown frequencies from total and median
Secondary 2
6 marks
TGM Original Questions
Core stretch
For 20 students, the numbers of mistakes 0, 2, 3, 4, 5 have frequencies \(6,x,y,4,2\). The median is 2.5.
- Form two equations and find \(x,y\).[3]
- Hence find the mode and mean number of mistakes.[3]
Solution:
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Answer:(a) \(x+y=8,6+x=10\), so \(x=y=4\) (b) mode \(0\), mean \(2.3\).
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