1 . Coffee A normally costs Tk.100 per lb. It is mixed with coffee B, which normally costs Tk.70 per lb, to from a mixture that costs Tk.88 per lb. If there are 10 lbs of the mix, how many pounds of coffee A is used in the mixture?

  • A. 4
  • B. 6
  • C. 5
  • D. 7
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