• # question_answer The average weight of 22 students in a class was 40 kg. When 8 new students joined the class, the average increased by 3 kg. What is the average of the 8 new students who joined the class? A)  47.5 kg             B)  49.5 kg C)                     43.5 kg D)         45 kg E)  None of these

Required average$=\frac{43\times 30-40\times 22}{8}$ $=\frac{1290-880}{8}=\frac{410}{8}=51.25\,\,kg$