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Question

Given below are two statements, followed by two conclusions, I and II. You have to consider the statements to be true even if they seems to be at variance with commonly known facts. You have to decide which of the given conclusions, if any, follow(s) from the given statements.

Statement 1 : All minutes are seconds.
Statement 2 : No seconds are hours.

Conclusion I : No hours are seconds.
Conclusion II : Some minutes are hours.

This question was previously asked in
RRB ALP/Technician 2018 CBT 2 Electronics Mechanic Question Paper (23-Jan-2019) (Shift 1)
The correct answer is
Only conclusion I follows

Statement and Conclusion Analysis

This question requires analyzing logical syllogisms based on given statements and determining which conclusions are valid.

Analyzing the Statements

  • Statement 1: \(All minutes are seconds\). This establishes that the set of 'minutes' is entirely included within the set of 'seconds'.
  • Statement 2: \(No seconds are hours\). This establishes that the set of 'seconds' and the set of 'hours' are completely separate, with no members in common.

Evaluating the Conclusions

Conclusion I: \(No hours are seconds\)

Statement 2 explicitly states that there is no overlap between 'seconds' and 'hours' (\(No seconds are hours\)). This relationship is symmetrical. Therefore, it is equally true that there is no overlap between 'hours' and 'seconds' (\(No hours are seconds\)).

Result: Conclusion I logically follows from Statement 2.

Conclusion II: \(Some minutes are hours\)

Statement 1 places all 'minutes' inside the 'seconds' category. Statement 2 states that 'seconds' and 'hours' are mutually exclusive categories.

Since all 'minutes' belong to the 'seconds' category, and 'seconds' have no members in common with 'hours', it logically follows that 'minutes' also cannot have any members in common with 'hours'. Therefore, the conclusion \(Some minutes are hours\) must be false.

Result: Conclusion II does not follow from the statements.

Final Determination

Only Conclusion I is logically derived from the given statements. Conclusion II contradicts the information provided.

Therefore, the correct option is the one stating that only Conclusion I follows.

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Similar Questions

  1. Read the given statements and conclusions carefully. You have to take the given statements to be true even if they seem to be at variance from commonly known facts and decide which conclusion(s) logically follow(s) from the given statements.
    Statements:
    All water is milk.
    No milk is oil.
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  2. Read the given statements and conclusions carefully. You have to take the given statements to be true even if they seem to be at variance from commonly known facts and decide which conclusion(s) logically follow(s) from the given statements.
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Important Questions from Syllogism

  1. Read the given statements and conclusions carefully. You have to take the given statements to be true even if they seem to be at variance from commonly known facts and decide which conclusion(s) logically follow(s) from the given statements.
    Statements:
    All water is milk.
    No milk is oil.
    Conclusions:
    (I) Some milk is water.
    (II) No oil is water.
  2. Read the given statements and conclusions carefully. You have to take the given statements to be true even if they seem to be at variance from commonly known facts and decide which conclusion(s) logically follow(s) from the given statements.
    Statements:
    Some vegetables are fruits.
    Some fruits are sweets.
    Conclusions:
    (I) Some fruits are vegetables.
    (II) Some sweets are vegetables.
  3. Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.
    Statements:
    All sparrows are owls.
    No sparrow is a parrot.
    Conclusions:
    (I): No owl is a parrot.
    (II): No parrot is a sparrow.
  4. Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.
     

    Statements:
    All forests are hills.
    Some hills are deserts.
     

    Conclusions:
    (I): All hills are forests.
    (II): Some deserts are hills.

  5. Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.
     

    Statements:
    All bottles are ludo.
    All ludo are dancer.
     

    Conclusions:
    (I): Some dancers are ludo.
    (II): All bottles are dancers.

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