Question

If the mean of the following distribution is 7.5 find the value p
X 3 5 7 9 11 13
Y 6 8 15 p 8 4

Answer 1

=>7.5=(6+8+15+p+8+4)/6

=>7.5*6=6+8+15+8+4+p

=>45=41+p

=>p=45-41

=>p=4