The number of subsets {x, y, z} of S so that x, y, z are in A.P.
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Answered by
7
Answer:
Number of elements in A=10
Number of subsets of A containing exactly two elements
= Number of ways we can select 2 elements from 10 elements
10
C
2
=
2
10×9
=45
∴ Number of subsets of A containing exactly two elements =45
Answered by
0
Answer:
right
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