In a class of $25$ students, there are $15$ boys. What is the percentage of girls in this class?

40%

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80%

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20%

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50%

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Solution

The correct option is B: $40 %$
The class strength is $25.$
Out of $25$ students, $15$ are boys.
Thus, number of girls $= 25 - 15 = 10$
Therefore, percentage of girls in the class $= \frac{No. of girls}{Total strength} \times 100 %$
$= \frac{10}{25} \times 100 = 40 %$

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In a class of 25 students, there are 15 boys. What is the percentage of girls in this class?

The correct option is B: 40%The class strength is 25. Out of 25 students, 15 are boys. Thus, number of girls =25−15=10 Therefore, percentage of girls in the class =No. of girlsTotal strength×100% =1025×100=40%

In a class of $25$ students, there are $15$ boys. What is the percentage of girls in this class?

The correct option is B: $40 %$
The class strength is $25.$
Out of $25$ students, $15$ are boys.
Thus, number of girls $= 25 - 15 = 10$
Therefore, percentage of girls in the class $= \frac{No. of girls}{Total strength} \times 100 %$
$= \frac{10}{25} \times 100 = 40 %$