Question 112
Let $X=a+7b$, $Y=2a+5b$, and $Z=4a+2b$, where $a,b$ are positive real numbers. Then:
(A) $X\lt Y\lt Z$
(B) $Z\lt Y\lt X$
(C) $Y\lt X\lt Z$
(D) $Y\lt Z\lt X$
(E) The order of $X,Y,Z$ depends on the values of $a,b$.
(A) $X\lt Y\lt Z$
(B) $Z\lt Y\lt X$
(C) $Y\lt X\lt Z$
(D) $Y\lt Z\lt X$
(E) The order of $X,Y,Z$ depends on the values of $a,b$.