In a college 50% students are boys out of which 40% have

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In a college $50 %$ students are boys out of which $40 %$ have got $80 %$ and above marks. Overall, $45 %$ of all the students have got $80 %$ and above marks. Find the percentage of girls who have got less than $80 %$ marks.

Answer: Option C
:
C

Suppose 100 students are in the college: 50 boys and 50 girls. Now $40 %$ of the boys i.e. 20 boys have got $80 %$ and above marks. And Total 45 students have got $80 %$ and above marks. So, number of girls who have got $80 %$ and above = 25. Total number of girls = 50. Hence $50 %$ of the girls have got less than $80 %$ marks.

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