B1. (a) The unfinished Histogram and Frequency Table give information about the times, in hours, taken by runners to complete the Maths-town Marathon. Histogram Frequency Table Frequency density Time (t hours) Frequency 2

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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B1. (а)
The unfinished Histogram and Frequency Table give information about the
times, in hours, taken by runners to complete the Maths-town Marathon.
Histogram
Frequency Table
Frequency
density
Time (t hours)
2 <t < 3
3 <t < 3.5
3.5 <t < 4
Frequency
1200
4 <t< 4.5
800
4.5 <t < 6
1440
4.
5
6.
Time (t hours)
(iii)What percentage of the runners finished in under 3 hours.
Give your answer to the nearest 10%.
Transcribed Image Text:B1. (а) The unfinished Histogram and Frequency Table give information about the times, in hours, taken by runners to complete the Maths-town Marathon. Histogram Frequency Table Frequency density Time (t hours) 2 <t < 3 3 <t < 3.5 3.5 <t < 4 Frequency 1200 4 <t< 4.5 800 4.5 <t < 6 1440 4. 5 6. Time (t hours) (iii)What percentage of the runners finished in under 3 hours. Give your answer to the nearest 10%.
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