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GATE 2017 EC (EC2) – Question 3

General Aptitude · Analytical Aptitude: Logical Reasoning, Deduction and Analogy · 1 mark · Multiple choice

A rule states that to drink beer one must be over 18 years old. In a bar, P is 16, Q is 25, R is drinking milkshake and S is drinking beer. What must be checked to ensure that the rule is followed?

  1. Only P's drink
  2. Only P's drink and S's age
  3. Only S's age
  4. Only P's drink, Q's drink and S's age

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Correct answer: (B) Only P's drink and S's age

Explanation

The rule is beer implies age above 18. A violation requires someone drinking beer while not old enough.

Check P's drink because P is only 16, and check S's age because S is drinking beer. Q is already old enough regardless of drink; R is not drinking beer, so the rule imposes no age condition on R.

Thus only **P's drink and S's age, B**, must be checked.

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