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To get an output Y = 1 in the given circuit which of the following inputs will be correct:
A
A = 0, B = 1, C = 0
B
A = 1, B = 0, C = 0
C
A = 1, B = 0, C = 1
D
A = 1, B = 1, C = 0
Detailed Solution
A and B feed an OR gate; its output and C feed an AND gate: $Y = (A + B)\cdot C$
For Y = 1 we need C = 1 and at least one of A, B equal to 1.
Only A = 1, B = 0, C = 1 satisfies this: $Y = (1 + 0)\cdot1 = 1$
For Y = 1 we need C = 1 and at least one of A, B equal to 1.
Only A = 1, B = 0, C = 1 satisfies this: $Y = (1 + 0)\cdot1 = 1$