COPTR Stage 1 Practice Test

If 40% of a class of 30 students are girls, how many girls are there?

12 8 18 15

Correct Answer:

Explanation:

Taking 40% of a class means finding 40 per hundred of the total. For 30 students, 10% is 3 students (30 ÷ 10 = 3), so 40% is four times that amount: 4 × 3 = 12. You can also see it as 40% = 2/5, and 30 × 2/5 = 12. Therefore, there are twelve girls.

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