GATE Computer Science (CS) 2017 Shift 2 Solved Paper

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Question : 37 of 65

Marks: +1, -0

If w, x, y, z Boolean variables, then which one of the following is INCORRECT?

wx + w(x + y) + x(x + y) = x + wy
$wx↖{¯} (y + z↖{¯}) ↖{¯} + w↖{¯}x = w↖{¯} + x + \:y↖{¯}z$
(wx̅ (y + xz̅ ) + w̅ x̅)y = xy̅
(w + y) (wxy + wyz) = wxy + wyz

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