Krisp cereal is 10% sugar by weight. Brano cereal is 2% sugar by weight. If you wanted to make the mixture 4% sugar by weight what should the ratio of Krisp to Brano.  Pick one
A) 1/2 B) 1/3 C) 1/4 D) 1/5 E) 1/6
w1 is the weight krisp, w2 is the weight of Brano   using weighted average formula w1/w2 = (c2 - avg) / (Avg-c1)   w1/w2 = 4-2 / 10-6 = 2/3   So Krisp and brano should be mixed in the ratio of 1/3.   ANSWER:1/3
<result>B</result>
Krisp cereal is 10% sugar by weight. Brano cereal is 2% sugar by weight. If you wanted to make the mixture 4% sugar by weight what should the ratio of Krisp to Brano.