Question

# There are 42 students in a class and $\frac{5}{7}$ of the students are boys. How many girls are there in the class?

Solution

## Number of boys in the class = $\frac{5}{7}$ of the total no. of students                                            =$\frac{5}{7}$ $×$ 42 = $\left(\frac{5×42}{7}\right)=5×6=30$ ∴ Number of girls in the class = 42 − 30 = 12 Hence, there are 12 girls in the class.MathematicsRS Aggarwal (2017)Standard VII

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