An alloy which does not contain copper is

The alloy of zinc that does not contain copper in good percentage is

Which of the following alloys does not contain copper ?

Which of the following alloys does not contain copper

Which of the following alloys does not contain copper?

Which of the following does not contain copper?

An alloy A contains two elements, copper and tin in the ratio of 2 : 3, whereas an alloy B contains the same elements in the ratio of 3 : 4. If 20 kg of alloy A, 28 kg of alloy B and some more pure copper are mixed to form a third alloy C which now contains copper and tin in the ratio of 6 , 7, then what is the quantity of pure copper mixed in the alloy C ?

An alloy is to contain copper and zinc in the ratio 9:4. If quantity of copper is 24 kg, the quantity of zinc is -

Which of the alloys contains copper ?