Question

120 boys and 30 girls appear for an examination .What percentage of the candidates are girls at the centre?

Answer 1

Answer:

Total number of candidates = 120+30

=150.

percentage of girls among the candidates =

(30/150)*100            //30/150 is to find the number of girls per 1 candidate..

                                   for 100 candidates we multiply it with 100.

=20%

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Answer 2

SOLUTION :

The number of girls = 30      (given)

The number of boys = 120      (given)

Total students = 120+30 = 150

Now,

To be found :-

The percentage of the candidates are girls at the centre

= $\bf \frac{Number \: of \: girls}{Total\:number \:of \:students} \times 100$

= $\bf \frac{30}{150}\times 100$

= $\bf 20%$

Hence,

The percentage of the candidates are girls at the centre is 20%