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Let X = {1, 2, 3, 4, 5). The number of d...

Let X = {1, 2, 3, 4, 5). The number of different ordered pairs (Y,Z) that can be formed such that `Y sube X, Z sube X` and `Y sube Z` is empty, is

A

52

B

35

C

25

D

53

Text Solution

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The correct Answer is:
B
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