Given that= Y(multiples of 3 less than 20),find the number proper subset of Y?

Given that= Y(multiples of 3 less than 20),find the number proper subset of Y?



Given,

Value of Y = {3,6,9,12,15,18} , so any 6 of them is the value of Y

Number of subsets = `2^6`, including the null set and all of the elements

Use the definition of "proper subset" that you learned to finetune the answer.

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