In an examination, 4 marks are awarded for each correct answer and 1 mark is deducted for each incorrect answer. A candidate attempted all 80 questions and scored 220 marks. How many questions were answered correctly?
Answer and explanation
Correct answer: A. 60
- Step 1: Let be correct and be wrong: . Step 2. Score formula: . Step 3. . Answer: 60. Why not the others: 55 yields 195 marks; 65 yields 245 marks; 50 yields 170 marks.
Practise more Kemampuan Numerik dan Logika Aritmetika.
Free questions with an explanation for every one, and full timed CPNS Indonesia mock tests.
More Kemampuan Numerik dan Logika Aritmetika questions
- Find the next number in the series: 3, 7, 15, 31, 63, ?
- If a train traveling at a constant speed of 72 km/h crosses a 200-meter bridge in 20 seconds, what is the length of the train in meters?
- A team of 12 civil servants can complete an administrative audit in 15 days. If 3 additional civil servants of equal efficiency join the tea…
- Find the missing term in the alternating series: 4, 18, 8, 14, 12, 10, ?
- A civil service department has 240 staff members. If 60% are analysts and the rest are administrators, and 75% of the analysts hold postgrad…
- If and , which statement correctly describes the relationship between and ?