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UGC-NET | UGC NET CS 2016 July – II | Question 25

  • Last Updated : 07 Apr, 2021
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In how many ways can the string
A ∩ B – A ∩ B – A
be fully parenthesized to yield an infix expressionp?
(A) 15
(B) 14
(C) 13
(D) 12


Answer: (B)

Explanation: Formula is :-

1/N * 2(N-1)C(N-1)

Where N is number of operands in the expression A ∩ B – A ∩ B – A

i.e 5

Hence ,



=1/5 * 8C4

=14

Hence option B is correct

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