A survey of of some student (in kg)of class 8th is given below. Find the value of p if mean is 39.6 . No. Of student- 1 5 16 p 2 Weight in kg - 27 33 39 45 51
Answers
Answer:
Value of p = 6
Step-by-step explanation:
We are given the following data;
Weight in kg (X) No. of students (f) X*f
27 1 27
33 5 165
39 16 624
45 p 45*p
51 2 102
∑f = 24 + p ∑X*f = 918 + 45*p
Mean of data is given by, X bar =
39.6 =
39.6(24 + p) = 918 + 45*p
950.4 + 39.6*p = 918 + 45*p
45*p - 39.6*p = 950.4 - 918
p = 32.4/5.4 = 6
Therefore, value of p = 6.