Two teachers are interviewing top 6 students in an exam;in two different subjects starting at the same time.Each teacher intetviews for 15 minutes;find the number of ways in which the interviews can be scheduled?

Since two teachers are interviewing 6 students, each student can be asked question on any of the two subjects

number of ways in which a student can be asked questions = 2

number of ways in which two teachers ask question from 6 students= 6C2=15

therefore total number of ways of taking interviews= 2*15=30