In what proportion should ingredients at #780 and #840 pee kg be mixed to obtain a mixture Worth #820 per kg

Answer 1

To find the proportion in which ingredients at #780 per kg and #840 per kg should be mixed to obtain a mixture worth #820 per kg, we can set up a weighted average equation:

Let x be the proportion of #780 per kg ingredient and (1-x) be the proportion of #840 per kg ingredient.

780x + 840(1-x) = 820

Solving this equation, we get:

780x + 840 - 840x = 820

-60x = -20

x = 1/3

So, the ingredients at #780 per kg and #840 per kg should be mixed in the proportion of 1:2 to obtain a mixture worth #820 per kg.