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In a class, 60% of the students are boys. In an examination, 80% of thegirls scored more than 40 marks (Maximum Marks =150). If 60% of the total students scored more than 40 marks in the same exam, what is the fraction of the boys who scored 40 marks or less? |
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Answer» Assume TOTAL no of students = 100 Assume Total no of students = 10060% of the students are BOYS. so Boys=60,GIRLS=40 Assume Total no of students = 10060% of the students are boys. so Boys=60,Girls=40No. of girls who scored more than 40 marks = 80% of girls = 80% of 40 = 32. Assume Total no of students = 10060% of the students are boys. so Boys=60,Girls=40No. of girls who scored more than 40 marks = 80% of girls = 80% of 40 = 32.No. of students who scored more than 40 marks = 60% of Total Therefore No. of boys who scored more than 40 marks = 60-32=28 No. of boys who scored less= Total boys – Boys(scored more) = 60-28=32 No. of boys who scored less= Total boys – Boys(scored more) = 60-28=32Fraction=(scored less)/Total boys = 32/60 =8/15 |
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