Suppose May needed 3 gallons of milk. If she wants to spend the least amount of money, using any combination of the three sizes above, how much will she spend? Prove that you methods guarantees Maya will spend the least amount of money.

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.