The blood alcohol limit for a driver who has held a licence for 2 years in Cyprus is 0.2 mg/ml. A test shows 0.35 mg/ml. By how much is the reading over the limit?
Answer and explanation
Correct answer: D. 0.15 mg/ml
- Step 1: The limit for a driver who has held a licence for 2 years is 0.2 mg/ml and the reading is 0.35 mg/ml. Step 2. Excess = 0.35 - 0.2 = 0.15 mg/ml. Answer: 0.15 mg/ml. Why not the others: -0.15 mg/ml: -0.15 mg/ml subtracts the limit of the other driver group (0.5 mg/ml). 0.35 mg/ml: 0.35 mg/ml is the whole reading, not the excess. 0.55 mg/ml: 0.55 mg/ml adds the limit instead of subtracting it.
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