February 19, 2017

Homework Help: Mathematics

Posted by James on Sunday, January 15, 2012 at 9:30am.

A shopkeeper mixed coffee powder worth $2.50 per kg with coffee powder worth $3.50 per kg, and sold 20 kg of the mixture at $2.80 per kg. Find the weights of the 2 grades of coffee powder that he mixed together. Explain clearly your steps of solving it.

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