In the question two statements are given, followed by two conclusions, I and II. You have to consider the statements to be true even if they seem to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follows from the given statements.
Statements:
I. No mobile is an electronic item.
II. All electronic items are costly.
Conclusions:
I. No costly is a mobile.
II. Some costly are mobile.

Question

Question

This question was previously asked in

SSC CHSL Tier-I Exam 2022 Official Paper (Held On: 13 March, 2023 Shift 2)

Answer 1

Statements:

I. No mobile is an electronic item.

II. All electronic items are costly.

The least possible Venn diagram for the given statement is:

Conclusion:

I. No costly is a mobile - False (No definite relation given between costly and mobile, so it can be possible only).

II. Some costly are mobile - False (No definite relation given between costly and mobile, so it can be possible only).

Here, Conclusion I and III forms complementary pair for either-or.

So, Either conclusion I or II follow.

Hence, the correct answer is "Option 3".

Additional Information

Conditions of Either-or case:

1. The elements should be the same in both the statements.

2. Both the conclusions should be false individually.

3. One conclusion should be positive and one conclusion should be negative (Complementary pair)

- The two complementary pairs are:

1) All + Some not

2) No + Some

Note: Some + Some not is not considered under Either -or case.