Question

Which of the following statements is/are redundant to answer the above questions?

In the following coded arithmetic questions certain symbols are used with the following meaning:
I. P @ Q means add P to Q.
II. P # Q means subtract Q from P.
III. P $ Q means multiply P with Q.
IV. P ^ Q means divide P by Q. Now study the given information and answer the questions following it. Three persons A, B and C complete a work in 40 days. B and C together are 5/4 times as efficient as A and B together. On the other hand, A and C together are 7/5 times as efficient as B and C together.
A I only
B II only
C Either I or II only
D Either I or III only
E All are necessary
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