Question

Let X be a set of letters in the word SINGAPORE and Y be the set of letters in the word PINS. Is Y a subset of X ? Explain. ​

Answer 1

Answer:

Set membership x ∈ X means x is an element of the set X. ... Empty set ∅ denotes the set containing no elements; it is sometimes written as {}. The set of natural numbers N has elements 0,1,2,3,.... Intersection X ∩ Y is defined by: x ∈ X ∩ Y if and only if x ∈ X and x ∈ Y .

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