TCS Company Numerical Ability Profit and Loss

The marked price of a shirt and trousers are in the ratio 1:2. The shopkeeper gives 40% discount on the shirt. If the total discount in the set of the shirt and trousers is 30%, the discount offered on the trouser is:
A)25% B)20% C)30% D)15%

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TCS Other Question

In a certain city, 60 percent of the registered voters are Party A supporters and the rest are Party B supporters. In an assembly election, if 75% of the registered Party A supporters and 20% of the registered Party B supporters are expected to vote for Candidate A, what percent of the registered voters are expected to vote for Candidate A?
A)60 B)75 C)53 D)20
Why reference is not same as a pointer?
A)Reference does not need an explicit dereferencing mechanism B)A reference can never be null C) A reference once established cannot be changed D)All of the above