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Question
It costs X taka each to make the first thousand copies of a CD and Y taka to make each subsequent copy. How many taka will it cost to make Z copies (Z is greater than 1000) of the CD?
1000X +YZ
1000(Z-X) + XY
1000 (Z-Y) +XZ
1000(X-Y) +YZ
ANSWER : 4
Descrption
<p style="margin-left:0px;">Total copies to be made =z</p><p style="margin-left:0px;">Cost of first 1000 copies =1000x</p><p style="margin-left:0px;">Now remaing copies has to be made =z−1000</p><p style="margin-left:0px;">Cost of remaining copies =y×(z−1000)<br> </p><p style="margin-left:0px;">Total cost =1000x+y×(z−1000)<br> </p><p style="margin-left:0px;">=1000(x−y)+yz</p>
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