Fuel contamination levels at each of 20 | CAT Logical Reasoning
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The question below is from previous year CAT question from CAT 2018 exam comes from CAT Logical Reasoning: Fuel contamination levels at each of 20…
Find out by answering this question which tests an aspirant’s DILR Ability Skills:
CAT 2018 - Slot 1 - Set 6 - Fuel contamination levels at each of 20
Fuel contamination levels at each of 20 petrol pumps P1, P2, …, P20 were recorded as either high, medium, or low.
1.Contamination levels at three pumps among P1 – P5 were recorded as high.
2. P6 was the only pump among P1 – P10 where the contamination level was recorded as low.
3. P7 and P8 were the only two consecutively numbered pumps where the same levels of contamination were recorded.
4. High contamination levels were not recorded at any of the pumps P16 – P20.
5. The number of pumps where high contamination levels were recorded was twice the number of pumps where low contamination levels were recorded.
Q. 1: Which of the following MUST be true?
1. The contamination level at P10 was recorded as high.
2. The contamination level at P13 was recorded as low.
3. The contamination level at P20 was recorded as medium.
4. The contamination level at P12 was recorded as high.
Correct Answer: 1
Explanation: According to 1 and 2, we get
Also, from 4, we get 2 cases:
From (5)
If total number of low (L) pipes = 3
number of high (H) pipes = 6 number of medium (M) pipes = 11 Also if number of low (L) pipes = 4 number of high (H) pipes = 8 number of medium (M) pipes = 8 P7 and P8 can be HH or MM
Therefore, two cases arise for P1 – P10
Q. 2: What best can be said about the number of pumps at which the contamination levels were recorded as medium?
Correct Answer: 1
Q. 3: If the contamination level at P11 was recorded as low, then which of the following MUST be true?
1. The contamination level at P12 was recorded as high.
2. The contamination level at P14 was recorded as medium.
3. The contamination level at P15 was recorded as medium.
4. The contamination level at P18 was recorded as low.
Correct Answer: 2
Q. 4: If contamination level at P15 was recorded as medium, then which of the following MUST be FALSE?
1. Contamination level at P14 was recorded to be higher than that at P15.
2. Contamination levels at P10 and P14 were recorded as the same.
3. Contamination levels at P13 and P17 were recorded as the same.
4. Contamination levels at P11 and P16 were recorded as the same
Correct Answer: 4
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