Help pls help i don't know this answer

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

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.

Ofin . (2,4) (2,1) a. y= 2 b. x= 2 c. x= -2 d. y= 2x