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Que.  If P, Q, R are Boolean variables, then (P + Q')(PQ' + PR)(P'R' + Q') simplifies 
a.  PQ' 
b.  PR' 
c.  PQ' + R 
d.  PR'' + Q 
Answer:PQ' 
Revathi :(March 26, 2019)
How the problem is solved .plz explain it

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