Question

If a set A has 12 elements, find the number of subsets of A having

i) 4 elements ii) atleast 3 elements iii) atmost 3 elements​

Answer 1

Answer:

(i) 4 elements

Step by step explanation :

4 elements =12C4=495

=4096−(1+12+66)=4096−79=4017

=1+12+66+220

=299

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