Question

18) 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 Jersy milk
should be added to every 100 gal of Holstein milk to have milk that is 4% butterfat?

Guys please help me with this question I’m using all my points for this please just help me

Answer 1

• 68 gallons

Explanation:

• Milk of Holstein cows ⇒ 3.66% butterfat
• Milk of Jersey cows ⇒ 4.5% butterfat

If we add x gal of 4.5% milk, then we have below equation:

• 100*0.0366 + x*0.045 = (100 + x)*0.04
• 3.66 + 0.045x = 0.04x + 4
• 0.045x - 0.04x = 4 - 3.66
• 0.005x = 0.34
• x = 0.34/0.005
• x = 68 gal