find the missing frequency x when mode is 67 class frequency 40-50 5 50-60 x 60-70 15 70-80 2 80-90 7 Share with your friends Share 31 Rishabh Mittal answered this As mode is 67, that lies in the interval 60-70.So , modal class is 60-70 .lower limit of modal class, l=60 frequency of modal class, f1=15 Frequency of the class preceeding the modal class, f0=xFrequency of the class succeeding the modal class, f2=2 Class size, h=10We know,Mode=l+f1-f02f1-f0-f2×h67=60+15-x30-x-2×1067-60=15-x28-x×10710=15-x28-x196-7x=150-10x3x=-46x=-463 .x can't be negative so , check your question again . -35 View Full Answer