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    Question

    Some fans are not switches. Some switches are not

    coolers. All invertors may be switches. In the given question, a set of conclusions is given. There are five options comprising of three or more statements. You need to choose the option that contains the set of statements from which the given conclusions logically follow.
    A All fans are coolers. Some switches are invertors. No cooler is an AC. No Ac is a switch. Correct Answer Incorrect Answer
    B All Ac are switches. Some fans are coolers. No coolers are AC . No switch is a invertor. Correct Answer Incorrect Answer
    C All coolers are AC . Some fans are coolers. All switches are invertors. No Ac is a switch. Correct Answer Incorrect Answer
    D Some fans are coolers. No cooler is an AC. Some switches are invertors. No Ac is a switch. Correct Answer Incorrect Answer
    E Both 2nd and 4th Correct Answer Incorrect Answer

    Solution

    Some fans are coolers (I) + All coolers are AC (A) ⟹ Some fans are AC (I) + No AC is a switch (E) ⟹ Some fans are not switches. (O). All coolers are AC (A) + No Ac is a switch (E) ⟹ No cooler is a switch (E) ⟹ Some switches are not coolers (O). All switches are invertors (A) ⟹ Conversion ⟹ Some invertors are switches (I) ⟹ [Probable conclusion] ⟹ All invertors may be switches (A).
    By elimination method - By option 1, there is no relation between fan and switch, so we can’t draw negative conclusion. Hence it is eliminated. By option 2, No switch is invertor. So it is eliminated. By option 4, we can’t draw –ve conclusion between Fan and switches. Hence it is eliminated. By option 3, the conclusion can be drawn. Hence answer is 3.

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