In a class there are 20 juniors, 15 seniors and 5 graduate students. If the junior averaged 65 in the midterm exam, the senior averaged 70 and the graduate students averaged 91, then what is the mean of the centre class approximately? (a) 71 (b) 74 (c) 70 (d) 72 Share with your friends Share 0 Anand Kumar Pandey answered this 0 View Full Answer