Question

Find: x and y if mean of data is 50 and sum of all frequency is 120

class intervals
0-20
20-40
40-60
60-80
80-100
frequency (fi)
17
x
32
y
19

(xi)
10
30
50
70
90

(fixi)
170
30x
1600
70y
1710​

Answer 1

Answer:

............x=28 and y=24

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