- A15
- B21
- C27
- D11
Step-by-Step Solution
Students with 20 or more are in the classes 20–30, 30–40 and 40–50: .
Answer: C) 27
The histogram shows the marks scored by the students of Class in a test out of 50. How many students scored 20 marks or more?
Class 8Data HandlingData Handling
Key idea: Histograms — bars that touch
A histogram is a bar graph for **grouped** data:
- The -axis shows class intervals (continuous, so bars TOUCH).
- The -axis shows frequency.
- Bar widths are equal (one per class).
- Bar height = frequency of that class.
Difference from a regular bar graph: bar graphs separate distinct categories with gaps; histograms show continuous data with no gaps.
- The -axis shows class intervals (continuous, so bars TOUCH).
- The -axis shows frequency.
- Bar widths are equal (one per class).
- Bar height = frequency of that class.
Difference from a regular bar graph: bar graphs separate distinct categories with gaps; histograms show continuous data with no gaps.
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