What is the roster form of B = {x : x is a vowel in the English alphabet}?
Answer and explanation
Correct answer: B = {a, e, i, o, u}
A roster form lists every member explicitly inside braces. The standard vowels of the English alphabet are a, e, i, o, and u, so option A gives the required list. Option B contains consonants, C mixes vowels with consonants, and D incorrectly includes w and y while omitting a and e. No repetition is needed in a set.
Frequently asked questions
What is the correct answer to this question?
B = {a, e, i, o, u}
Why is this the correct answer?
A roster form lists every member explicitly inside braces. The standard vowels of the English alphabet are a, e, i, o, and u, so option A gives the required list. Option B contains consonants, C mixes vowels with consonants, and D incorrectly includes w and y while omitting a and e. No repetition is needed in a set.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Common Questions.
