alleryStart learning →Bars A, B, C, D read 55, 70, 45 and 90. By how much does their mean exceed bar C?
- 25
- 10
- 15
- 20
Show answer and solution
Correct answer: D. 20
The mean is 260/4 = 65, and 65 - 45 = 20.
SSC CGL Histogram — practice questions — page 2
Explore 51 free Histogram questions in SSC CGL Quantitative Aptitude. Open each question or exercise to read its content, reference answers and available explanation.
Practise Histogram with Quill →Histogram questions and exercises with answers
Showing questions 31–51 of 51.
Bars A, B, C, D read 55, 70, 45 and 90. By how much does their mean exceed bar C?Read the answer and worked solution →On a bar chart, 1 cm stands for 25 students. How many students does a 7.2 cm bar show?Read the answer and worked solution →With a scale of 1 cm for 40 units, how tall should the bar for 260 units be?Read the answer and worked solution →Yearly sales bars read 150, 180 and 210. Ratio of first two years' total to the third?Read the answer and worked solution →A grouped (clustered) bar chart shows how many bars for each category?Read the answer and worked solution →In a histogram, the rectangles for successive class intervals are usually what?Read the answer and worked solution →A class spanning 20 to 40 has frequency 50 in a histogram with unequal widths. Frequency density?Read the answer and worked solution →In a histogram each bin is for a range of values, but in a bar chart each bar is for a what?Read the answer and worked solution →A histogram used for probability density has a total area normalized to what?Read the answer and worked solution →Marks are grouped as 35-45, 45-55, 55-65 and so on. What is the class width?Read the answer and worked solution →Frequencies for 15-25, 25-35, 35-45, 45-55 are 6, 11, 17 and 9. Which is the modal class?Read the answer and worked solution →Classes 0-10, 10-20, 20-30, 30-40 have frequencies 5, 8, 12, 7. How many values are below 30?Read the answer and worked solution →Data range over 60 units and each class is 5 units wide. How many classes are needed?Read the answer and worked solution →Frequencies 4, 7, 11 and 8 fill four classes. What is the cumulative frequency of the third class?Read the answer and worked solution →Ages 5-10, 10-15, 15-20, 20-25 have frequencies 6, 14, 12, 8. What percent are aged 10 to 20?Read the answer and worked solution →Classes 0-10 and 10-20 have frequencies 4 and 6. Using class marks, what is the mean?Read the answer and worked solution →Classes 20-30, 30-40, 40-50 have frequencies 5, 10 and 5. What is the mean by class marks?Read the answer and worked solution →The points of a frequency polygon are plotted against which value of each class?Read the answer and worked solution →A frequency polygon is drawn for classes 40-50 and 50-60. Where are its points on the x-axis?Read the answer and worked solution →Classes 10-20, 20-30, 30-40, 40-50 have frequencies 5, 9, 14, 7. Ogive height at upper limit 40?Read the answer and worked solution →An ogive covers 80 observations. At what cumulative frequency do we read off the median?Read the answer and worked solution →
Worked practice questions
On a bar chart, 1 cm stands for 25 students. How many students does a 7.2 cm bar show?
- 180
- 160
- 190
- 170
Show answer and solution
Correct answer: A. 180
7.2 x 25 = 180 students, since bar length is proportional to the value.
With a scale of 1 cm for 40 units, how tall should the bar for 260 units be?
- 7 cm
- 6 cm
- 6.5 cm
- 5.5 cm
Show answer and solution
Correct answer: C. 6.5 cm
260/40 = 6.5 cm.
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