Arlene had 1/3 as many goldfish as Isabelle. Isabelle has 5 times as many goldfish as Bruce. If Bruce had 18 goldfish, how many goldfish does Arlene have

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.