If the mean of the following distribution is 27, find the value of p.
class: 0-10 10-20 20-30 30-40 40-50
Frequency: 8 p 12 13 10
Answers
Answer:
Value of p = 7
Step-by-step explanation:
We are the following distribution below;
Class Frequency (f) X X*f
0 - 10 8 5 40
10 - 20 p 15 15*p
20 - 30 12 25 300
30 - 40 13 35 455
40 - 50 10 45 450
∑f = 43 + p ∑X*f = 1245 + 15*p
Mean of the data, X bar =
27 =
27(43 + p) = 1245 + 15*p
1161 + 27*p = 1245 + 15*p
27*p - 15*p = 1245 - 1161
12*p = 84
p = 84/12 = 7
Therefore, value of p = 7 .
Answer:
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Step-by-step explanation:
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