A 4-bit XS-3 parallel adder needs ______ 4-bit parallel adder IC

A 4-bit XS-3 parallel adder needs ______ 4-bit parallel adder IC
| A 4-bit XS-3 parallel adder needs ______ 4-bit parallel adder IC 74LS83s.

A. 3

B. 2

C. 4

D. 1

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Right Answer is: B

SOLUTION

A 4-bit XS-3 parallel adder needs two 4-bit parallel adder IC 74LS83s. The circuit diagram is as shown:

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