(a)[2]
Find the number of trains Deborah recorded.
(b)[2]
Calculate the percentage of the trains recorded that arrived more than $10$ minutes late.
Mathematics 0580 · IGCSE · Statistical charts and diagrams
Statistical charts and diagrams — practice question
Deborah keeps a tally of the number of minutes late, $t$, for trains as they arrive at a station. This histogram presents the data. The horizontal axis is marked “Number of minutes late” and runs from $0$ to $25$. The vertical axis is marked “Frequency density”.