Cereal A is 10% sugar by weight, whereas healthier but less delicious Cereal B is 2% sugar by weight. To make a delicious and healthy mixture that is 5% sugar, what should be the ratio of Cereal A to Cereal B, by weight?	Choose the correct choice from the following
A) 2 : 5	B) 3 : 5	C) 4 : 7	D) 2 : 6	E) 1 : 4

Rationale: "2 % is 3 % - points below 5 % and 10 % is 5 % - points above 5 % . the ratio of a : b should be 3 : 5 . the answer is b ."
Answer: B