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The number of proper subsets (123) is

The number of proper subsets (123) is


 

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2 Answers

Arkalekha Neogi
16 Points
10 years ago

The number of proper subsets is given by 2n-1,where n is the cardinal number of the set.

in A={1,2,3}, cardinal no. is 3 as number of elements is 3.

=>no. of proper subsets of A=2n-1 =23-1=8-1=7.

hope this is what you were looking for.

veeravalli mohan
33 Points
10 years ago

the formula for number of proper sub sets is 2^n-2

so 

2^3-2

8-2=6

 

i hope you understood this

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