Which of the following describes the zeroes of the graph of f(x)=3x^ 6 +30x^ 5 +75x^ 4 ?

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.