Question

the ratio of the number of boys and girls in a class is 5:3. if 20% of the boys and 60% of the girls have passed in first class, then what percent of the class has passed in first class please do answer its urgent thanks in advance

Answer 1

35%

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Answer 2

Answer:

35%

Step-by-step explanation:

The ratio of the number of boys and girls in a class is 5:3

Let the ratio be x

So, No. of boys = 5x

No. of girls = 3x

Total no. of student= 5x+3x=8x

20% of the boys have passed in first class

So, No. of boys passed = $\frac{20}{100} \times 5x = x$

60% of the girls have passed in first class

So, No. of girls passed = $\frac{60}{100} \times 3x =1.8 x$

So, Total % of students passed first class = $\frac{x+1.8x}{8x} \times 100$

                                                                  = $\frac{2.8}{8} \times 100$

                                                                  = $35$

Hence 35%  of the class has passed in first class