Question

Question 3
Logic is basically human reasoning that tells us if certain proposition or declarative statement is true.
(a)There are five boards of directors (kojo, kofi, menash musah, and mawule) of a School. The board of director kojo owns 10% shares, kofi owns 30% shares, mensah owns 20% shares, musah owns 25% shares and mawule 15% shares of the total shares. For the adoption of the particular policy to be passed in the boards meeting more than 66% should vote in favour of the policy. The weightage to the votes depend upon the percentage shares owned by the directors. In the boards room each director has a switch which he turns ON if votes in favour of policy. Design a switching circuit to ring a bell if policy is accepted in the boards meeting. Only the NAND gates should be used to realize the circuit. (CR 7marks)

(b) With relevant logic diagram and truth table explain the working of a two input EX-OR gate.
(EV marks8)

(c) Perform the following subtractions using 2s complement method.
(i) 01000 01001 (ii) 01100 00011 (iii) 0011.1001 0001.1110 (CR 5marks)
(Total 20 marks)

Answer 1