Question

the mean of the following frequency disribution is 62.8 and sum of the all frequencies is 50 compute the missing fre​

Answer 1

Step-by-step explanation:

n total of f = 50

mean = 62.8

x = 10,30,50,70,90,110

xf = 50,30f 1 , 500 , 70f 2 , 630 , 880

xf total = 2060 + 30f1 + 70f2

mean = 2060 + 30f1 + 70f2 / 50

62.8 = 2060 + 30f1 + 70f2 / 50

62.8 × 50 = 2060 + 30f1 + 70f2

3140 = 2060 + 30f1 + 70f2

3140 - 2060 = 30f1 + 70f2

1080 = 30f1 + 70f2

1080 = 100f1,2

1080/100 = F1,2

10.8 = F1,2

F1 = 10.8

F1 = 10.8F2 = 10.8