Question : Directions: Two statements are given followed by two conclusions I and II. You have to consider these statements to be true, even if they seem at variance from commonly known facts. Decide which of the given conclusions logically follow/s from the given statement.
Statements:
1. All petunias are flowers.
2. No flower is black.
Conclusions:
I. Some petunias are black.
II. No petunia is black.
Option 1: Both the conclusion I and II follows
Option 2: Neither conclusion I nor II follows
Option 3: Only conclusion I follows
Option 4: Only conclusion II follows
Correct Answer: Only conclusion II follows
Solution : The possible Venn diagram, according to the given statements is as follows –
Let's analyse the conclusions –
Conclusion (I):
Some petunias are black – Since all petunias are flowers and no flower is black, so no petunia will be black. Thus, this conclusion does not follow.
Conclusion (II):
No petunia is black – Since all petunias are flowers and no flower is black, so no petunia will be black. Thus, this conclusion follows.
So, only conclusion II follows. Hence, the fourth option is correct.
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