What is the median of the data set? 17, 18, 20, 22, 24, 25, 30
A. 17
B. 30
C. 7
D. 22
Please help I will give brainiest!!!

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.