2 votes 2 votes Average age of class of 39 student is 15 years. If the age of teacher is included the average is increased by 3 months. Find the age of the teacher? Sangay asked Aug 1, 2018 Sangay 863 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes Total age of students= X/39 = 15*12 = 7020 (in months) Toatal age of students & teacher= X/40 = (15*12)+3= 7320 (months) teacher's age = 7320-7020= 300(month)= 25 year Nihar22 answered Sep 20, 2018 Nihar22 comment Share Follow See all 0 reply Please log in or register to add a comment.