If the average weight of 6 students is 50 kg; the average weight of 2 students is 51 kg, and the average weight of 2 other students is 55 kg; what is the average weight of all the students?

If the average weight of 6 students is 50 kg; the average weight of 2 students is 51 kg, and the average weight of 2 other students is 55 kg; what is the average weight of all the students?
यदि 6 विद्यार्थियों का औसत भार 50 किग्रा है; 2 विद्यार्थियों का औसत भार 51 किग्रा है तथा 2 अन्य विद्यार्थियों का औसत भार 55 किग्रा है; तो सभी विद्यार्थियों का औसत भार क्या है?