Question

22. The average marks of a group of student is 50. another group of
15 students have an average marks of 60. What is the average marks of
80 students?​

Answer 1

Answer:

23.75

Step-by-step explanation:

Average age of 80 students = ( 50×20 + 15×60 ) / 80 = (1000 + 900)/80 = 1900/80 = 23.75