Which pair of sets is not equal?
Answer and explanation
Correct answer: A={1,3,5}, B={1,3,5,7}
Two sets are equal when they contain exactly the same distinct elements; order and repeated listing do not matter. Options A and B merely reverse the order. In D, the repeated 0 is ignored, so both sets contain 0 and 1. In C, B has an additional element 7, so the sets are not equal. Thus C is correct.
Frequently asked questions
What is the correct answer to this question?
A={1,3,5}, B={1,3,5,7}
Why is this the correct answer?
Two sets are equal when they contain exactly the same distinct elements; order and repeated listing do not matter. Options A and B merely reverse the order. In D, the repeated 0 is ignored, so both sets contain 0 and 1. In C, B has an additional element 7, so the sets are not equal. Thus C is correct.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Number Systems.
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