The mean weight of 120 students in a class is 56 kg. If the mean weight of boys and that of the girls in the class are 60 kg and 50 kg respectively, then the number of boys in the class are_____.
The given pie chart gives the marks scored in an examination by a student in English, Hindi, Science & Technology, Social Science and Mathematics. If the total marks obtained by the student were 540, then the subject in which the student scored 105 marks, is______.
C Social Science