if the curves for more than ogive and less than ogive of a given grouped data meet at [30.45]then the median of the data is
If the 'less than type' ogive and 'more than type' ogive intersect each other at (20.5,15.5) then the median of the given data is
(a) 5.5 (b) 15.5 (c) 20.5 (d) 36.0