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Question

The marks (out of 100) obtained by group of students in a science test are 85,76,90,85,39,48,56,95,81 and 75. Find the:

1)Highest and lowest marks obtained by students.
2)Mean marks obtained.
3)No. of students who obtained marks more than mean marks.

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Solution

Arranging given marks in ascending order,
39,48,56,75,76,81,85,85,90,95

Highest and lowest marks obtained by students are 39 and 95.

Number of students =10

Mean marks obtained

=39+48+56+75+76+81+85+85+90+9510=73010=73

Number of students securing more than mean marks 73 =7 students. {75,76,81,85,85,90,95}

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