Find the value of p,if mean of following distribution is 20.

Question

X 15 17 19 20+p 23
Y 2 3 4 5p 6

Answer 1

by simple observation,

the x's increase by 2 , so 20+p = 21
thus p=1
which lets the y's increase nicely by 1

Answer 2

Cal the xi fi and fixi then the total.
Put the values in the formula of mean.since mean is given!! More easier and the final result comes as P=1 .Hence done!!!!

Answer 3

Good