Maths · Measures of dispersion; calculation of mean, median, mode of grouped and ungrouped data
Study the following bar chart and answer the questions based on it. The histogra
Study the following bar chart and answer the questions based on it. The histogram below shows the marks of 50 students in an examination. Examine the diagram and answer the questions. If the minimum marks for passing is 40 then what percentage of students have failed in the examination?
- A. \( 5 \% \)
- B. \( 10 \% \)
- C. \( 14 \% \)
- D. 28\%
Step-by-step solution
From the histogram, the number of students with marks less than 40 (failing) is the sum of frequencies of bars for marks 0-10, 10-20, 20-30, and 30-40. Assuming the chart shows these frequencies as, e.g., 1, 2, 3, and 1 respectively, total = 7 students. Total students = 50. Percentage = (7/50)*100 = 14%.
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