the mean of the following data is 18.75.Find the value of p. 10-5 , 5-10 , p-7 , 25-8 , 30-2.
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Answered by
4
Step-by-step explanation:
Frequency distribution table:
xi f
i
f
i
x
i
10 5 50
15 10 150
p 7 7p
25 8 200
30 2 60
N=Σf
i
=32
Σf
i
x
i
=460+7p
Mean
x
=
N
Σf
i
x
i
∴18.75=
32
460+7p
∴600=460+7p
∴p=
7
600−460
∴p=20
Answered by
10
Answer:
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