Question

Find the value of the missing frequency if mode of the following data is 65.


class Frequency
0-20 6
20-40 8
40-60 f
60-80 12
80-100 6
100-120 5

Answer 1

10 6 60

30 8 240

50 f 50f

70 12 840

90 6 720

110 5 550

37+f 2410+50f

2410+50f ÷ 37+f = 65

therefore f = 1 by 3