Set Theory and Algebra MCQ

1:

Let D30 = {1, 2, 3, 4, 5, 6, 10, 15, 30} and relation I be partial ordering on D30. The all lower bounds of 10 and 15 respectively are

A.

1,3

B.

1,5

C.

1,3,5

D.

None of these

 

Answer : B

Explanation :

Vinodh Routhu said: (7:20pm on Sunday 24th August 2014)
lower bounds are 1,5 because remaining all are upper bounds

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Option: A

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