In Boolean algebra, rule (X+Y)(X+Z) =
(A) Y+XZ
(B) X+YZ
(C) XY+Z
(D) XZ+Y


Answer: (B)

Explanation: in Boolean algebra,

(X+Y)(X+Z) = X + XZ + XY + YZ
           = X(1 + Z + Y) + YZ  // as (1 + A = A)
           = X.1 + YZ 
           = X + YZ

Option (B) is correct.

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