Question

in a school ,out of 300students ,70% are girls and 30%are boys . if 30girls leave and no new boy is admitted , what is the new percentage of girls in the school​

Answer 1

Answer:

Total number of students = 300

Percentage of girls = 70%

Number of girls =

$\frac{70}{100} \times 300 = 210$

Percentage of boys = 300-210 = 20

If 30 girls leave

Total number of remaining students = 300-30= 270

No of remaining girls = 210-30 = 180

Percentage of new girls =

$\frac{180}{270} \times 100\% \\ \\ = 66.66\%$

Answer 2

Answer:

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