Question

if average (mean) of the following marks obtain by students of class 5 is 35,26,45,37,43,49, x, 22 and 30. find the unknown mark x

Answer 1

Answer:

We know that mean is

Mean = sum of all items / total items

5= 35 + 26 + 45 + 37 + 43 + 49 + X + 22 + 30 / 9

5= 287 + x / 9

45 - 287 = x

-242 = x