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Representations of Data

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Question 94

The partially completed histogram and the partially completed table show the times taken, to the nearest second, for a group of people to complete a puzzle.

A partially completed histogram showing Frequency Density against Time (s), with bars for the 5–8 and 11–15 second classes and no numerical scale on the vertical axis.

Time (seconds)Frequency
1–44
5–812
9–106
11–15
16–20
a.

Find the frequency for the 11–15 second class.

[1]
b.

One of the participants is selected at random.

The probability that this participant completed the puzzle in under 9 seconds is 49\dfrac{4}{9}94​.

Find the frequency for the 16–20 second class.

[2]
c.

Complete the histogram.

[2]
Markscheme

Representations of Data Questions

  1. A Level
  2. /Maths
  3. /Representations of Data

160 exam-style questions on Edexcel A Level Maths Representations of Data, covering 3.1 Outliers, 3.2 Box Plots, 3.3 Cumulative Frequency, 3.4 Histograms, and 3.5 Comparing Data. Each one has a worked solution and a mark scheme showing where the marks go.

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