Question 1104838
if holstein cows produce milk that is on average 3.66% butterfat and jersey cows produce milk that is on average 4.5% butterfat, how many gallons of jersey milk should be added to every 100 gallons of Holstein milk to have milk that is 4% butterfat?
:
Let j = amt of Jersey milk required
.0366(100) + .045j = .04(j+100)
3.66 + .045j = .04j + 4
.045j - .04j = 4 - 3.66
.005j = .34
j = .34/.005
j =  68 gal of Jersey milk to be added to the 100 of Holstein milk
:
:
check this in the original equation
3.66 + .045(68) = .04(168)
3.66 + 3.06 = 6.72