435 l = klso what do i put in the blank spot ? ? i dont know how to do this

Classify the following triangle check all that apply

The sum of the reciprocal of a positive number and the reciprocal of 2 more than the number is 3/4 equation: the number is

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?