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Bundeswettbewerb Mathematik 1974 Problem 1.3

Source: Bundeswettbewerb Mathematik Round 1

October 16, 2022

combinatoricscountingSubsets

Problem Statement

Let

M

be a set with

n

elements. How many pairs

(A, B)

of subsets of

M

are there such that

A

is a subset of

B?

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