Which set is equal to {2, 3, 5, 7}?
Answer and explanation
Correct answer: {x : x is a prime natural number less than 10}
The prime natural numbers less than 10 are 2, 3, 5, and 7. Therefore, the set described in option A is exactly {2, 3, 5, 7}. Number 1 is not prime, so option B has an extra element. Option C contains even numbers rather than the required primes, and option D contains 11 while omitting 2. Hence only option A represents a set equal to the given set.
Frequently asked questions
What is the correct answer to this question?
{x : x is a prime natural number less than 10}
Why is this the correct answer?
The prime natural numbers less than 10 are 2, 3, 5, and 7. Therefore, the set described in option A is exactly {2, 3, 5, 7}. Number 1 is not prime, so option B has an extra element. Option C contains even numbers rather than the required primes, and option D contains 11 while omitting 2. Hence only option A represents a set equal to the given set.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Sets. Topic: The Empty Set, Finite and Infinite Sets, Equal Sets.
