Direction : Study the given histogram carefully and answer the questions given below it. The number of hours for which 80 students of a particular class watched television during holidays has been shown through the given graph.
How many students spent more than 5 hours in watching TV ?
14
In a histogram the height of each bar gives the frequency of its class interval. Reading the given graph, the classes of hours of TV watched per day and the number of students are: 1–2 hours: 4, 2–3 hours: 8, 3–4 hours: 22, 4–5 hours: 32, 5–6 hours: 8 and 6–7 hours: 6. Check: 4 + 8 + 22 + 32 + 8 + 6 = 80, which matches the 80 students stated in the data.
Step 1 — ‘More than 5 hours’ covers the classes that start at 5 hours or later: 5–6 and 6–7 hours.
Step 2 — Add their frequencies: 8 + 6 = 14 students.
10 and 16 match no combination of these two bars, and 12 would need two bars of 6 each, which the graph does not show.
14 option is correct.
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