PrepTest Milkfat

This topic has expert replies
Master | Next Rank: 500 Posts
Posts: 141
Joined: Thu May 03, 2007 1:15 pm

PrepTest Milkfat

by drhomler » Fri Jun 15, 2007 12:14 pm
Three grades of milk are 1%, 2% and 3% milk fat by volume if x gallons of the 1% grade, Y gallons of the 2% grade Z gallons of the 3% are mixed x+y+z is 1.5% milk fat. What is x in terms of y and Z.

A) y+3Z
b)(Y+Z)/4
C)2Y+3Z
D)3Y+Z
E)3Y+4.5Z

I need a speedy approach
Source: — Problem Solving |

User avatar
Master | Next Rank: 500 Posts
Posts: 400
Joined: Sat Mar 10, 2007 4:04 am
Thanked: 1 times
Followed by:1 members

by f2001290 » Fri Jun 15, 2007 12:45 pm
1X + 2Y + 3Z = 1.5(X+Y+Z)

X = Y+3Z. Hence A

Master | Next Rank: 500 Posts
Posts: 141
Joined: Thu May 03, 2007 1:15 pm

by drhomler » Fri Jun 15, 2007 12:51 pm
Thanks-I appreciate it
I dont know why I was making that so complicated

Newbie | Next Rank: 10 Posts
Posts: 2
Joined: Sat Jun 30, 2007 7:13 pm
Location: NY

by manu singhal » Sun Jul 29, 2007 6:07 am
f2001290 wrote:1X + 2Y + 3Z = 1.5(X+Y+Z)

X = Y+3Z. Hence A
can you please explain the math behind this. thanks.