Q22 / 60 · KVPY 2011 (SA) · Mathematics

There are 30 questions in a multiple -choice test. A student gets 1 mark for each unattempted question, 0 mark for each wrong answer and 4 marks for each corrent answer. A student answered $x$ question correctly and scored 60 . Then the number of possible value of $x$ is

  • A
    15
  • B
    10
  • Correct answer
    C
    6
  • D
    5

Solution

\begin{array}{|c|c|c|} \hline Right & Wrong & Unattempted \\ (4 marks) & (0 mark) & (1 marks) \\ \hline 15 & & 0 \\ 14 & & 4 \\ 13 & & 8 \\ 12 & & 12\\ 11 & & 16\\ 10 & & 20\\ \hline \end{array} 6 cases.

Hence, the correct answer is option: 'C'.

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