The following frequency distribution table shows the amount of aid given to 50 flood affected families. Find the mean of the amount of aid.
Amount of aid : No. of families
(Thosand rupees)
50-60 : 7
60-70 :13
70-80 : 20
80-90 : 6
90-100 : 4
Answers
Answer:
mean of the amount of aid = 72.4
Step-by-step explanation:
Class Mean u = (Mean - 75)/10 frequency = f u*f
50 - 60 55 -2 7 -14
60 - 70 65 -1 13 -13
70 - 80 75 0 20 0
80 - 90 85 1 6 6
90 -100 95 2 4 8
Sum 50 -13
Mean = 75 + 10 * (-13/50)
= 75 - 2.6
= 72.4
mean of the amount of aid = 72.4