Question
Solve the following quadratic equation by completing square method:
$x^2+3 x+1=0$
$x^2+3 x+1=0$
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Marks | 20 - 30 | 30 – 40 | 40 – 50 | 50 – 60 | 60 – 70 | 70 – 80 | 80 -90 | 90-100 |
No. of students | 8 | 10 | 15 | 25 | 30 | 38 | 24 | 10 |
How many students are getting above 80 marks.