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Standard XII

Biology

Lifespan of an Organism

Statements: S...

Question

Statements: Some hens are cows. All cows are horses.
Conclusions:
I. Some horses are hens.
II. Some hens are horses.

Only conclusion I follows

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Only conclusion II follows

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Either I or II follows

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Neither I nor II follows

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Both I and II follow

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Solution

The correct option is E Both I and II follow
Since one premise is particular, the conclusion must be particular and should not contain the middle term. So, II follows. I is the converse of II and so it also holds.

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Similar questions

Q. Statements: Some hens are cows. All the cows are horses.
Conclusions
A. Some horses are hens.
B. Some hens are horses.

Choose the correct option about the conclusion drawn from the given statements.

Statements:

Some hens are cows.

All cows are horse.
Conclusion:
I. Some horses are hens.
II. Some hens are horses.

Q. Assertion :Some hens are cows.

All cows are horse.

Reason: I. Some horses are hens.
II. Some hens are horses.

Q. In the question, two statements are given, followed by two conclusions. Consider the statements to be true even if it seems to be at variance from commonly known facts. Decide which of the given conclusions, if any, follow(s) from the given statements.

Statements

:

Some hens are cows.
All the cows are horses.

Conclusions

:

1.

Some horses are hens.

2.

Some hens are horses.

Statements:

All horses are birds.

All birds are tigers.

Some tigers are lions.

Some lions are monkeys.

Conclusions:

I. Some tigers are birds.

II. Some monkeys are horses.

III. Some tigers are horses.

IV. Some monkeys are birds.

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Statements: Some hens are cows. All cows are horses.Conclusions: I. Some horses are hens.II. Some hens are horses.

The correct option is E Both I and II followSince one premise is particular, the conclusion must be particular and should not contain the middle term. So, II follows. I is the converse of II and so it also holds.

Statements: Some hens are cows. All cows are horses.
Conclusions:
I. Some horses are hens.
II. Some hens are horses.

The correct option is E Both I and II follow
Since one premise is particular, the conclusion must be particular and should not contain the middle term. So, II follows. I is the converse of II and so it also holds.