If the mean of the following data is 15, find p.
x: 5 10 15 20 25y: 6 p 6 10 5
Answers
Answer:
Value of p = 8 .
Step-by-step explanation:
We are given the mean of following distribution;
X f X*f
5 6 30
10 p 10*p
15 6 90
20 10 200
25 5 125
∑f = 27+p ∑X*f = 445+10*p
Mean of the data is given by, X bar =
15 =
15(27 + p) = 445+ 10*p
15*p - 10*p = 445 - 405
5*p = 40
p = 40/5 = 8
Therefore, value of p for the given distribution is 8 .