Reduce to lowest terms.
3m^2-3n^2/6m-6n
a) -m-n/2
b) m-n/2
c) m+n/2

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.