The blood limit given by Cyprus Police is 50 mg of alcohol per 100 ml. In mg/ml this equals:

Answer and explanation

Correct answer: C. 0.5 mg/ml

  1. Step 1: 50 mg per 100 ml means dividing by 100 ml. Step 2. 50 / 100 = 0.5 mg/ml. Answer: 0.5 mg/ml. Why not the others: 0.05 mg/ml: this shifts the decimal one place too far. 5 mg/ml: this is ten times too large. 50 mg/ml: this ignores dividing by 100.

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