What is the roster form of S={x: x is a letter occurring in the word SCHOOL}?
Answer and explanation
Correct answer: S={S,C,H,O,L}
The governing concept is roster form and the rule that a set contains each distinct element only once. The word SCHOOL has the letters S, C, H, O, O, and L. Because O is repeated, it is listed only once in the set. Thus the roster is {S,C,H,O,L}. Option B wrongly repeats O, while C and D omit required letters, so A is correct.
Frequently asked questions
What is the correct answer to this question?
S={S,C,H,O,L}
Why is this the correct answer?
The governing concept is roster form and the rule that a set contains each distinct element only once. The word SCHOOL has the letters S, C, H, O, O, and L. Because O is repeated, it is listed only once in the set. Thus the roster is {S,C,H,O,L}. Option B wrongly repeats O, while C and D omit required letters, so A is correct.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Number Systems.
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