Teaching DSSSB TGT Mock Test 2025 Mathematics Relations and Functions Types of Relations

Let A = {1, 3, 4, 5, 7} and R be the relation defined by R = {(x, y) ∈ A × A: y - x is even integer}. Then the minimum number of element need to add to R so that R is symmetric relation is

1
1
2
4
3
6
4
10
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