Question

If fi=15 fixi=3p+36and the mean of a disturbution is 3 then find the value of p\

Answer 1

Given :
fixi =3p+36
fi =15
mean=3
then p =?

mean= fixi/fi
=>3=3p+36/15
=>45=3p+36
=>45-36=3p
=>9=3p
=>3=p

:.p=3