Same chapter2 marksDifficulty: Easy
How many subsets does a set with 5 elements have, and how many of them are proper subsets?
Sets
2 marksDifficulty: Easy
Distinguish between a finite and an infinite set, and between an empty set and a singleton set.
Original Khojo Papers practice question — not from a past board paper.
Answer
A finite set has a definite number of elements and an infinite set does not. An empty set has no element at all and is written ∅ or { }, while a singleton set has exactly one element.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The set {∅} is a singleton, not an empty set, because it contains one element.
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In a class of 60 students, 35 play cricket, 28 play football and 12 play both. How many play neither?
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