the average age of 9 students and their teachers is 16 years the average age of the first four student is 19 years and that of the last 5 years 10 years find the teachers age
Answers
Answered by
0
AV. ag of 9 students. and 1 teacher
means total 9+1= 10 people
total sum of all students' age is 16*9
=144
1st 4 students' age = 19
so sum of there ages = 19*4
=76
such. a way 5*10= 50
total 5+4 = 9students over
sum of ages of 9 students is 76+50
=126
so the teacher's age is total age - students' age
= 144-126
= 18
hope it is right and helpful also.......
means total 9+1= 10 people
total sum of all students' age is 16*9
=144
1st 4 students' age = 19
so sum of there ages = 19*4
=76
such. a way 5*10= 50
total 5+4 = 9students over
sum of ages of 9 students is 76+50
=126
so the teacher's age is total age - students' age
= 144-126
= 18
hope it is right and helpful also.......
Similar questions