Question

how to do it mean ????????

Answer 1

here is ur ans...mean is 15.2....

Answer 2

hello friend I am not solve ur question I am only give you instruction so first u make a table in first column u write x and second column u write f and third column u write fx in column x u write 12, 13 and so on and in column f u write 1,3 so on then in third column fx u write product of 12&1 ,13&3 and so on then you add column 2 numbers and fx numbers... I WANT TO SAY LIKE THIS.. OK