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In a class of 30 students, the marks scored in an examination are displayed in…

In a class of 30 students, the marks scored in an examination are displayed in the histogram. What percentage of the student scored more than 40%?
  • A.
    14%
  • B.
    40%
  • C.
    40(frac{3}{4})%
  • D.
    53(frac{1}{3})%
Correct Answer: Option C
Explanation

This histogram is transferred into this frequency table
(begin{array}{c|c} Marks & 20 & 40 & 60 & 80 & 100 \ hline students & 9 & 7 & 6 & 6 & 2end{array})
Students who scored more than 40 = 6 + 6 + 2 = 14
i.e. (frac{14}{30}) x 100% = 46(frac{3}{4})%