CAT Practice : Percents, Profits

Understanding the subjunctive clause is important in quant also. Otherwise, this question can sound absurd.

Percentages - Classroom

    Q.8: In a class, if 50% of the boys were girls, then there would be 50% more girls than boys. What percentage of the overall class is girls?
    1. 25%
    2. 33.33%
    3. 40%
    4. 20%

 

  • Correct Answer
    Choice D. 20%

Detailed Solution

For questions of this type, it is best to go from the final step. In the final state, the number of girls should be 1.5 * the number of boys.

When 50% of the boys are taken as girls, let the number of boys = x
Number of girls = 1.5x
total number of students = 2.5x

Original number of boys = 2x (50% of boys = x)
Original number of girls = 0.5x

Girls form 20% of the overall class.

Correct Answer: 20%



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