The average cost of three mobiles A, B and C of a certain company is Rs. 48000. The average cost decrease by 10 % when mobile D of the same company is included, find the cost price of mobile D?
ARs. 27500
BRs. 28800
CRs. 25500
DRs. 29800
ARs. 27500
BRs. 28800
CRs. 25500
DRs. 29800
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