SOLUTION: Average age of 30 students in a class is 10. then 1 more is took admission in that class. now the average of their age is 11. then find the age of last one?
Algebra ->
Average
-> SOLUTION: Average age of 30 students in a class is 10. then 1 more is took admission in that class. now the average of their age is 11. then find the age of last one?
Log On
Question 815517: Average age of 30 students in a class is 10. then 1 more is took admission in that class. now the average of their age is 11. then find the age of last one?
You can put this solution on YOUR website! To solve this we know that,
Average of age= total ages of students/ total Students
10 = total ages of students/30
10*30= total ages of students
300= Total ages of students
Now
When 1 student is added there will be total 11 students using above formula
Average of age= Total ages of students/ total ages of students
11 = total ages of students/ 31
Total ages of students= 31*11
= 341
Change in total age= 341 - 300
(