Do you know how to do this

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

Aphrase is shown read the phrase and give me the answer

60 musicians applied for a job at a music school. 14 of the musicians play both guitar and drums, 28 play drums, 18 play the guitar. what is the probability that the applicant who gets the job plays drums or guitar?