O-LevelMathematicsStatistics4024/12 · Oct/Nov 2019 · Q153 Marks
The time taken by each member of a group of students to solve a problem was recorded. Some of the results are summarised in the table and illustrated in the histogram. [Table: Time (t minutes) | Frequency 1<t≤2 | 6 2<t≤3 | 10 3<t≤4 | 12 4<t≤6 | p 6<t≤8 | 4] [Figure X.X]
- (a)Use the histogram to find the value of p.[1]
- (b)Complete the histogram.[2]
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Mark scheme
Marking points from the official mark scheme (Oct/Nov 2019). The mark or mark type is shown in brackets.
- [1] (a) 16
- [2] (b) Rectangle: base 1 to 2, height 6 and Rectangle: base 6 to 8, height 2 B1 for one correct rectangle
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