On Monday, a class has 8 girls and 20 boys. On Tuesday, a certain number of girls joined the class just as twice
that number of boys left the class, changing the ratio of girls to boys to 7 to 4. How many boys left the class on
Tuesday?
(A) 5
(B) 6
(C) 11
(D) 12
(E) 18
From Manhattan prep.
Question, which # is bigger? number of boys left the class or number of girls joined the class??
Thx