The circuit diagram shows a logic ‘combination’ with the states of outputs X, Y and Z given for inputs P, Q, and S all at state 1 (i.e., high). When inputs P and R change to state 0 (i.e. low), with inputs Q and S still at 1, the condition of outputs, X, Y and Z changes to
Text Solution
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CHECK THE SOLUTION.
Sol. 
P = 0, R = 0, Q = 1, S = 1
* Z = 
= 
= 
= 1 × 0 = 0
* X = P.Q = 0 × 1 = 0 * Y = R + S = 0 + 1 = 1
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