In a class of 48 students, 37.5% are girls. Then 6 more girls join the class. What percentage of the class is now girls?

33\frac{1}{3}\%

Correct answerYour answer

37\frac{1}{2}\%

Correct answerYour answer

44\frac{4}{9}\%

Correct answerYour answer50%Correct answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer C

Correct answer: C

Girls at first = $37.5\% \text{ of } 48 = 18$ .
After 6 join: girls = 24, class size = $48 + 6 = 54$ .
Percentage = $\frac{24}{54} \times 100 = \frac{4}{9} \times 100 = 44\frac{4}{9}\%$ .

Worth noting

The class grows too. Keeping 48 as the total gives $\frac{24}{48} = 50\%$ , the tempting wrong answer.

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