Arectangular prism with a volume of 10 cubic units is filled with cubes with side lengths of 1/2 unit. how many 1/2 unit cubes does it take to fill the prism?

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.