In a class 60% of the students were boys and 30% of them had I class. If 50%of the students in the class had I class, find the fraction of the girls in the class who did not have a I class.

1 / 5

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Solution

The correct option is A $1 / 5$
$Letthenumberofstudentsbex,boyswithfirstclass=0.3∗0.6x=0.18x,numberofgirls=0.4x,studentswithfirstclass=0.5x,girlswithfirstclass=0.5x−0.18x=0.32x,fractionofgirlswithoutfirstclass=0.4−0.32x0.4x=15$

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In a class 60% of the students were boys and 30% of them had I class. If 50%of the students in the class had I class, find the fraction of the girls in the class who did not have a I class.

The correct option is A 1/5Letthenumberofstudentsbex,boyswithfirstclass=0.3∗0.6x=0.18x,numberofgirls=0.4x,studentswithfirstclass=0.5x,girlswithfirstclass=0.5x−0.18x=0.32x,fractionofgirlswithoutfirstclass=0.4−0.32x0.4x=15

The correct option is A $1 / 5$
$Letthenumberofstudentsbex,boyswithfirstclass=0.3∗0.6x=0.18x,numberofgirls=0.4x,studentswithfirstclass=0.5x,girlswithfirstclass=0.5x−0.18x=0.32x,fractionofgirlswithoutfirstclass=0.4−0.32x0.4x=15$