Two coffee mixture problem > A coffee merchant mixes a dark roast coffee that costs \$10 per pound with a light roast coffee that costs \$7 per pound. Assuming the merchant wants to make a profit, which of the followi...--prophetes.ai

Two coffee mixture problem > A coffee merchant mixes a dark roast coffee that costs \$10 per pound with a light roast coffee that costs \$7 per pound. Assuming the merchant wants to make a profit, which of the following are not possible answers for the cost per pound of the mixture? (i) \$9.40 (ii) \$7.60 (iii) \$11.00 (iv) \$6.50 (v) \$8.50 I'm stumped, I searched for similar questions, no avail. please help.

Hint: The per pound value of any mixture will lie between the values of the component parts of the mixture.