প্রশ্ন সংশোধন করুন
প্রশ্ন:
The average age of 30 students is 10 years and that of another group of 5 of them is 14 years. What is the average age of the remaining students ?
The average age of 30 students is 10 years and that of another group of 5 of them is 14 years. What is the average age of the remaining students ?