প্রশ্ন সংশোধন করুন
প্রশ্ন:
In an examination of four subjects, a student got 70,80, 90 and x marks and his average was 75. What was the value of x?
In an examination of four subjects, a student got 70,80, 90 and x marks and his average was 75. What was the value of x?