Question

33. Find the missing frequencies a, b and c in the following frequency distribution, when it is given
the b c = 4:3 and mean =50,sum of frequency = 120
Class interval
0-20,
20-40,
40-60, 60-80, 80-100.
Frequency
17,a,b,c,19​

Answer 1

Step-by-step explanation:

sum of ratio=7

b=4\7×50=200/7

c=3/7×50=150/7

frequency

17,28.57,21.53,19