Average cost of 10pens is rupees 200 & average cost of 10 pensil is 100 rupees find the average cost of the all pens&pensils
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Step-by-step explanation:
10pens of average cost 200
10×200=2000
10pensin f average cost 100
10×100=1000
pens+pensin= 20
total average 2000+1000=3000
3000/20=150
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