Benefited 7670

There are 30 boys in the class, and 28 of them passed. The girls all benefited. A total of 95% of the students passed the course. How many girls are in the class of girls?

Correct answer:

d =  10

Step-by-step explanation:

0.95(d+30) = 28+d

0.95·(d+30) = 28+d

0.05d = 0.5

d = 0.5/0.05 = 10

d = 10

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