Find the missing value of p, for the following distribution whose mean is 12.58.


x:



5



8



10



12



p



20



25



f :



2



5



8



22



7



4



2



X



f



fx



5



2



10



8



5



40



10



8



80



12



22



264



p



7



7p



20



4



80



25



2



50




N = 50



∑fx = 7p + 524



Given, mean = 12.58


= 12.58


= 12.58



7p = 629 – 524


7p = 105


p =


= 15


6