Mixture of nuts

The mixture of nuts should be prepared from almonds, peanuts and cashew nuts ratio 1: 2: 3 (respectively). The price of almonds is 150 CZK/kg, the price of peanuts is 140 CZK/kg and the price of cashew nuts is 180 CZK/kg. The price of the mixture is determined by the ratio in which the nuts are mixed.

What will be the price of one kilogram of the walnut mixture?

Correct result:

c =  161.6667 Kc/kg

Solution:

$c={\displaystyle \frac{1\cdot 150+2\cdot 140+3\cdot 180}{1+2+3}}={\displaystyle \frac{485}{3}}=161.6667\text{ Kc/kg}$

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