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Question

Marks obtained by a student in English 46%, Mathematics 67%, Sanskrit 72%, Economics 58%, Political science 53% and History 53%. If it is agreed to given double weights to marks in Englsih and Mathematics as compared to other subjects, the weighted mean is

A
58.43
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B
48.43
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C
57.75
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D
None of these
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Solution

The correct option is C 57.75
The required mean is
=m1x1+m2.x2+m3x3+...mnxnm1+m2+m3+...mn
=2(0.46)+2(0.67)+0.72+0.58+0.53+0.532+2+1+1+1+1
=4.628
=0.5775
=57.75%

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