Question 1146493
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There are many ways to solve "mixture" problems like this, including using the ugly formula that the other tutor showed.<br>
But here is what is surely the fastest and easiest way....<br>
(1) The 9% target percentage is 5/8 of the way from 4% to 12%, the percentages of the two ingredients.
(2) That means 5/8 of the mixture is the higher percentage ingredient.<br>
ANSWER: 5/8 of 40 ounces, or 25 ounces, of the 12% sodium snack mix A; the other 15 ounces of snack mix B.